Fix the (clang -Werror) build by removing an unused member variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175607 91177308-0d34-0410-b5e6-96231b3b80d8
Fully qualify llvm::next to avoid ambiguity when building as C++11.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175608 91177308-0d34-0410-b5e6-96231b3b80d8