Remove jsfiddle/jsbin/codepen links

We'd prefer not to have JSFiddle links on MDN because it's hard for us to maintain this content.

Here's a list of all the places we're linking to JSFidddles (I think). Ideally, we would replace there with live samples. Note that many of them are in the Games area - I'm not sure if it's worth investing the time to remove these ones..

[ ] https://developer.mozilla.org/en-US/docs/games/techniques/2d_collision_detection
[ ] https://developer.mozilla.org/en-US/docs/games/techniques/3d_on_the_web/building_up_a_basic_demo_with_aframe
[ ] https://developer.mozilla.org/en-US/docs/games/techniques/3d_on_the_web/building_up_a_basic_demo_with_babylon.js
[ ] https://developer.mozilla.org/en-US/docs/games/techniques/3d_on_the_web/building_up_a_basic_demo_with_playcanvas/engine
[ ] https://developer.mozilla.org/en-US/docs/games/techniques/3d_on_the_web/building_up_a_basic_demo_with_three.js
[ ] https://developer.mozilla.org/en-US/docs/games/techniques/audio_for_web_games
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/animations_and_tweens
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/bounce_off_the_walls
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/build_the_brick_field
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/buttons
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/collision_detection
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/extra_lives
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/game_over
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/initialize_the_framework
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/load_the_assets_and_print_them_on_screen
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/move_the_ball
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/physics
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/player_paddle_and_controls
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/randomizing_gameplay
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/scaling
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/the_score
[ ] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_phaser/win_the_game
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/bounce_off_the_walls
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/build_the_brick_field
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/collision_detection
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/create_the_canvas_and_draw_on_it
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/finishing_up
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/game_over
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/mouse_controls
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/move_the_ball
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/paddle_and_keyboard_controls
[x] https://developer.mozilla.org/en-US/docs/games/tutorials/2d_breakout_game_pure_javascript/track_the_score_and_win
[x] https://developer.mozilla.org/en-US/docs/mdn/contribute/help_beginners
[x] https://developer.mozilla.org/en-US/docs/mdn/contribute/howto/create_an_interactive_exercise_to_help_learning_the_web
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/files
[ ] https://developer.mozilla.org/en-US/docs/web/api/document/anchors
[x] https://developer.mozilla.org/en-US/docs/web/api/element/click_event
[ ] https://developer.mozilla.org/en-US/docs/web/api/html_drag_and_drop_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/webgl_api/matrix_math_for_the_web
[ ] https://developer.mozilla.org/en-US/docs/web/api/webgl_api/webgl_best_practices
[ ] https://developer.mozilla.org/en-US/docs/web/api/webgl_api/webgl_model_view_projection
[ ] https://developer.mozilla.org/en-US/docs/web/api/xmlhttprequest/html_in_xmlhttprequest
[ ] https://developer.mozilla.org/en-US/docs/web/css/border-radius
[x] https://developer.mozilla.org/en-US/docs/web/css/css_animations/detecting_css_animation_support
[ ] https://developer.mozilla.org/en-US/docs/web/css/css_animations/tips
[ ] https://developer.mozilla.org/en-US/docs/web/css/offset-path
[x] https://developer.mozilla.org/en-US/docs/web/html/global_attributes/tabindex
[ ] https://developer.mozilla.org/en-US/docs/web/javascript/closures
[x] https://developer.mozilla.org/en-US/docs/web/performance/css_javascript_animation_performance

Codepens:

[ ] https://developer.mozilla.org/en-US/docs/learn/javascript/client-side_web_apis/drawing_graphics
[ ] https://developer.mozilla.org/en-US/docs/learn/tools_and_testing/client-side_javascript_frameworks/introduction
[ ] https://developer.mozilla.org/en-US/docs/web/accessibility/aria/roles/timer_role
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/animation
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/currenttime
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/finish_event
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/id
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/pause
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/play
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/playbackrate
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/playstate
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/reverse/
[ ] https://developer.mozilla.org/en-US/docs/web/api/animation/starttime
[ ] https://developer.mozilla.org/en-US/docs/web/api/canvas_api/tutorial/finale
[ ] https://developer.mozilla.org/en-US/docs/web/api/convolvernode
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/addelement
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/cleardata
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/dropeffect
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/effectallowed
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/getdata
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/items
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/setdata
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/setdragimage
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/types
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransferitem/kind
[ ] https://developer.mozilla.org/en-US/docs/web/api/document/evaluate
[ ] https://developer.mozilla.org/en-US/docs/web/api/document/execcommand
[ ] https://developer.mozilla.org/en-US/docs/web/api/dragevent
[ ] https://developer.mozilla.org/en-US/docs/web/api/element/animate
[ ] https://developer.mozilla.org/en-US/docs/web/api/iirfilternode
[ ] https://developer.mozilla.org/en-US/docs/web/api/keyframeeffect
[ ] https://developer.mozilla.org/en-US/docs/web/api/keyframeeffect/getkeyframes
[ ] https://developer.mozilla.org/en-US/docs/web/api/keyframeeffect/keyframeeffect
[ ] https://developer.mozilla.org/en-US/docs/web/api/keyframeeffect/target
[ ] https://developer.mozilla.org/en-US/docs/web/api/mediastream_recording_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/mutationobserver
[ ] https://developer.mozilla.org/en-US/docs/web/api/urlsearchparams/set
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_animations_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_animations_api/using_the_web_animations_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_animations_api/web_animations_api_concepts
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_audio_api/best_practices
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_audio_api/using_iir_filters
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_audio_api/using_web_audio_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/web_audio_api/web_audio_spatialization_basics
[ ] https://developer.mozilla.org/en-US/docs/web/css/css_scroll_snap
[ ] https://developer.mozilla.org/en-US/docs/web/css/css_scroll_snap/basic_concepts
[ ] https://developer.mozilla.org/en-US/docs/web/css/css_shapes
[ ] https://developer.mozilla.org/en-US/docs/web/css/offset-path
[ ] https://developer.mozilla.org/en-US/docs/web/css/transform-box
[ ] https://developer.mozilla.org/en-US/docs/web/html/global_attributes/id
[ ] https://developer.mozilla.org/en-US/docs/web/media/audio_and_video_manipulation
[ ] https://developer.mozilla.org/en-US/docs/web/svg/tutorial/paths

JSBins:

[ ] https://developer.mozilla.org/en-US/docs/learn/html/howto/use_data_attributes
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/files
[ ] https://developer.mozilla.org/en-US/docs/web/api/html_drag_and_drop_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/readablestream/cancel
[ ] https://developer.mozilla.org/en-US/docs/web/media/audio_and_video_delivery
[ ] https://developer.mozilla.org/en-US/docs/web/media/audio_and_video_delivery/buffering_seeking_time_ranges
[ ] https://developer.mozilla.org/en-US/docs/web/media/audio_and_video_delivery/webaudio_playbackrate_explained
[ ] https://developer.mozilla.org/en-US/docs/web/media/audio_and_video_manipulation

In https://developer.mozilla.org/en-US/docs/web/api/datatransfer/files, there is also a link to JSbin. Should we add the links to JSbin to this issue too, it is the same problem? (I found only 3 occurrences):

[ ] https://developer.mozilla.org/en-US/docs/web/api/readablestream/cancel
[ ] https://developer.mozilla.org/en-US/docs/web/api/html_drag_and_drop_api
[ ] https://developer.mozilla.org/en-US/docs/web/api/datatransfer/files

(For games/ I think we shouldn't do it ourselves but be ready to review contributions. Even if the section goes away at some point, I guess it will be archived, and having everything embedded will be better than having JSfiddle links that will go away at some point...)

mdn / content

Remove jsfiddle/jsbin/codepen links #16120