[LAA] Remove unused pointer partition argument from addRuntimeCheck, NFC

This variant of addRuntimeCheck is only used now from the LoopVectorizer
which does not use this parameter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243955 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed