[LAA] Remove unused pointer partition argument from needsChecking(), NFC

This is no longer used in any of the callers.  Also remove the logic of
handling this argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244421 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed