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/IPO/InlineSimple.cpp

@@ -29,7 +29,7 @@ using namespace llvm;
 
 namespace {
 
-  class VISIBILITY_HIDDEN SimpleInliner : public Inliner {
+  class SimpleInliner : public Inliner {
     // Functions that are never inlined
     SmallPtrSet<const Function*, 16> NeverInline; 
     InlineCostAnalyzer CA;