Remove unused but set variable.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194920 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectiveC ARC. Validate toll free bridge casting
of ObjectiveC objects to CF types when CF type
has the objc_bridge attribute.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194930 91177308-0d34-0410-b5e6-96231b3b80d8