remove espfs from this repo

[phatpaul]

See prior discussion: https://github.com/jkent/esp32-espfs/issues/1 To take advantage of new espfs improvements contributed by others since being introduced by sprite_tm in this libesphttpd.

Users may include espfs as a submodule at /components/espfs, which libesphttpd can then use. https://github.com/phatpaul/espfs/tree/libesphttpd (will link to @jkent jkent/esp32-espfs if he agrees to maintain it)

Example usage: https://github.com/phatpaul/esphttpd-freertos/tree/espfs_submodule

Depends on my changes to:

• components/espfs @ b87f89a

Todo:

• documentation on how to include espfs
• further testing
• I assume the Makefile.esp8266 and CMake are broken, but I don't use those.

Don't merge this until those submodules upstream repos merge the required changes.

[chmorgan]

@phatpaul let me know when you'd like me to review, if you'd like me to review.

[jkent]

@phatpaul I'm alright with maintaining esp32-espfs.

[phatpaul]

@chmorgan yes please review and merge when you have time. I've got it working for my project and need to keep moving...

[chmorgan]

@phatpaul merged!