Disable layout-transitivity test on FreeBSD for now.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@193259 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused variable.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@193266 91177308-0d34-0410-b5e6-96231b3b80d8