Remove a redundant condition found by PVS-Studio.

Filed http://llvm.org/PR30897 to teach Clang to warn on this kind of
stuff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285945 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed