Remove unused resources

[Pyker]

There are some unused resources in the launcher that get packaged into every release. We should get rid of them since it wastes both space and bandwidth.

Used PNG resources

These PNG resources are currently used (generated via `git grep -woh -E '[^"'']+.png' | sort | uniq`): - add_user.png - akliz-logo.png - arrow_right.png - background.png - checkbox_closed.png - checkbox_open.png - close.png - comboTriangle.png - danger_icon.png - delete_button.png - discord.png - download_button.png - download_icon.png - globe.png - icon.png - launch_splash.png - logo.png - minimize.png - modpack/ModImageFiller.png - news/authorHelm.png - options_cog.png - platform_icon_title.png - platform_logo.png - play_button.png - radio_deselected.png - radio_selected.png - req_failed.png - req_success.png - req_warning.png - status_left.png - status_right.png - teaser.png - update_available.png - warning_icon.png

[github-actions[bot]]

This issue is stale because it has been open for 90 days with no activity.