Remove unused QualifierAlive traverser

src/compiler.gypi

@@ -80,8 +80,6 @@
             'compiler/translator/Pragma.h',
             'compiler/translator/PruneEmptyDeclarations.cpp',
             'compiler/translator/PruneEmptyDeclarations.h',
-            'compiler/translator/QualifierAlive.cpp',
-            'compiler/translator/QualifierAlive.h',
             'compiler/translator/RegenerateStructNames.cpp',
             'compiler/translator/RegenerateStructNames.h',
             'compiler/translator/RemovePow.cpp',

src/compiler/translator/QualifierAlive.cpp

-//
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-
-#include "compiler/translator/IntermNode.h"
-
-class TAliveTraverser : public TIntermTraverser {
-public:
-    TAliveTraverser(TQualifier q) : TIntermTraverser(true, false, false, true), found(false), qualifier(q)
-    {
-    }
-
-	bool wasFound() { return found; }
-
-protected:
-    bool found;
-    TQualifier qualifier;
-
-    void visitSymbol(TIntermSymbol*);
-    bool visitSelection(Visit, TIntermSelection*);
-};
-
-//
-// Report whether or not a variable of the given qualifier type
-// is guaranteed written.  Not always possible to determine if
-// it is written conditionally.
-//
-// ?? It does not do this well yet, this is just a place holder
-// that simply determines if it was reference at all, anywhere.
-//
-bool QualifierWritten(TIntermNode* node, TQualifier qualifier)
-{
-    TAliveTraverser it(qualifier);
-
-    if (node)
-        node->traverse(&it);
-
-    return it.wasFound();
-}
-
-void TAliveTraverser::visitSymbol(TIntermSymbol* node)
-{
-    //
-    // If it's what we're looking for, record it.
-    //
-    if (node->getQualifier() == qualifier)
-        found = true;
-}
-
-bool TAliveTraverser::visitSelection(Visit, TIntermSelection*)
-{
-    if (wasFound())
-        return false;
-
-    return true;
-}

src/compiler/translator/QualifierAlive.h

-//
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-
-#ifndef COMPILER_TRANSLATOR_QUALIFIERALIVE_H_
-#define COMPILER_TRANSLATOR_QUALIFIERALIVE_H_
-
-bool QualifierWritten(TIntermNode* root, TQualifier);
-
-#endif // COMPILER_TRANSLATOR_QUALIFIERALIVE_H_