Revert r141060.  We should NEVER add new warnings that aren't guarded by flag.
Revert r141060.  We should NEVER add new warnings that aren't guarded by flag.

This reverts commit 5383d065241b18e84232bc50d81523f2058ea62b.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@141077 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang