Drop support of the build option USE_GLOO_IBVERBS (#33163)
Summary:
Two releases have passed since its deprecation:
8a026d4f74b71944ac2860c315996165a40f5626
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33163
Differential Revision: D19850713
Pulled By: ezyang
fbshipit-source-id: 30a60df470b88e8c40e33112296e437cde29c49f
