NFC, Remove commented out block of code from CGBlocks.cpp
NFC, Remove commented out block of code from CGBlocks.cpp

This is a preparation clean-up commit around the code that emits
block copy/dispose routines.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@296054 91177308-0d34-0410-b5e6-96231b3b80d8

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