Delete a dead store found by PVS-Studio.

Quite sad we still aren't really using aggressive dead code warnings
from Clang that we could potentially use to catch this and so many other
things.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285936 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed