Revert "Added hello_world"

This reverts commit d74f888b5e4dd142660fa63fbf5cd9593ad6148a.

Conflicts:
	hello_world.c
Revert d74f888..c2f5ade

This rolls back to commit d74f888b5e4dd142660fa63fbf5cd9593ad6148a.
Revert 3ce684e..e76ce3a

This rolls back to commit 3ce684e2057697f5f53d22f034610bb850fe3aba.