Remove mods from this repo in favor of headlesshq/mc-runtime-test-mod

[ChipWolf]

          We do this here already https://github.com/headlesshq/mc-runtime-test-mod

Originally posted by @3arthqu4ke in #40 (comment)

[3arthqu4ke]

Will do after #37

[ChipWolf]

#37 has unblocked now

This is now blocked by headlesshq/mc-runtime-test-mod#2

[3arthqu4ke]

As discussed on discord the question is also if we just move the mc-runtime-test-mod back here after headlesshq/mc-runtime-test-mod#2.