Revert "[flang][OpenMP] Fix LINEAR clause validation and test expectations (#175707)"
This reverts commit 6e62d40b7c65a67ac0e5c6e0f462ce2663db98b9.
The change causes test failures clause-validity01.f90 on multiple
builders (links below):
https://lab.llvm.org/buildbot/#/builders/207/builds/12198
https://lab.llvm.org/buildbot/#/builders/140/builds/36994
https://lab.llvm.org/buildbot/#/builders/50/builds/19637
https://lab.llvm.org/buildbot/#/builders/172/builds/18946
https://lab.llvm.org/buildbot/#/builders/29/builds/20278
https://lab.llvm.org/buildbot/#/builders/80/builds/19622