Clean headers in CppEditor.

Ran script to remove inludes on a trial-and-error basis and
manually corrected it.

Change-Id: I61a5c2fff02616f6883ddf3923e4361fca6bf92b
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/cppeditor/cppquickfixes.h

@@ -36,9 +36,6 @@
 
 #include <extensionsystem/iplugin.h>
 
-#include <cplusplus/AST.h>
-#include <cplusplus/ASTMatcher.h>
-
 QT_BEGIN_NAMESPACE
 class QByteArray;
 class QString;