Removing a variable that is initialized but never read. The original author has been alerted to the warning, in case this variable is meant to be used. Fixes -Werror builds in the meantime.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222649 91177308-0d34-0410-b5e6-96231b3b80d8