[NFC] cleanup noalias2.ll test

D75825 and D75828 modified llvm/test/Transforms/Inline/noalias2.ll to handle llvm.assume. The checking though was broken.
The NO_ASSUME has been replaced by a normal CHECK; the ASSUME rules were never triggered and have been removed.
The test checks have been regenerated.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D94978