Dispose of the diagnostics in clang-refactor-test
Dispose of the diagnostics in clang-refactor-test

414251c9711ba8fa6781f2f899d855a9579b91d5 forgot that.

apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang