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/LoopSimplify.cpp

@@ -57,7 +57,7 @@ STATISTIC(NumInserted, "Number of pre-header or exit blocks inserted");
 STATISTIC(NumNested  , "Number of nested loops split out");
 
 namespace {
-  struct VISIBILITY_HIDDEN LoopSimplify : public LoopPass {
+  struct LoopSimplify : public LoopPass {
     static char ID; // Pass identification, replacement for typeid
     LoopSimplify() : LoopPass(&ID) {}