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/LowerSwitch.cpp

@@ -31,7 +31,7 @@ namespace {
   /// LowerSwitch Pass - Replace all SwitchInst instructions with chained branch
   /// instructions.  Note that this cannot be a BasicBlock pass because it
   /// modifies the CFG!
-  class VISIBILITY_HIDDEN LowerSwitch : public FunctionPass {
+  class LowerSwitch : public FunctionPass {
   public:
     static char ID; // Pass identification, replacement for typeid
     LowerSwitch() : FunctionPass(&ID) {}