Clean headers in CppTools.

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

Change-Id: Ic8464ea084ca1ab401e9f4a7d0183b92b4038902
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/cpptools/cpprefactoringchanges.cpp

@@ -29,24 +29,13 @@
 
 #include "cpprefactoringchanges.h"
 
-#include "cppcodestylepreferences.h"
 #include "cppqtstyleindenter.h"
 #include "cppcodeformatter.h"
 #include "cppmodelmanager.h"
-#include "cpptoolssettings.h"
-#include "cpptoolsconstants.h"
-
-#include <texteditor/texteditorsettings.h>
-#include <texteditor/tabsettings.h>
 #include <projectexplorer/editorconfiguration.h>
 
-#include <cplusplus/TranslationUnit.h>
-#include <cplusplus/AST.h>
-
 #include <utils/qtcassert.h>
 
-#include <QTextBlock>
-
 using namespace CPlusPlus;
 using namespace CppTools;
 using namespace Utils;