Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.

Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/CodeExtractor.cpp

@@ -44,7 +44,7 @@ AggregateArgsOpt("aggregate-extracted-args", cl::Hidden,
                  cl::desc("Aggregate arguments to code-extracted functions"));
 
 namespace {
-  class VISIBILITY_HIDDEN CodeExtractor {
+  class CodeExtractor {
     typedef std::vector<Value*> Values;
     std::set<BasicBlock*> BlocksToExtract;
     DominatorTree* DT;