TextEditor: De-QObject-ify ICodeStylePreferences factories

Change-Id: I20fc5323c4192391ec6ac514a1b583ccb87b4796
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/texteditor/icodestylepreferencesfactory.cpp

@@ -29,8 +29,7 @@
 
 using namespace TextEditor;
 
-ICodeStylePreferencesFactory::ICodeStylePreferencesFactory(QObject *parent) :
-    QObject(parent)
+ICodeStylePreferencesFactory::ICodeStylePreferencesFactory()
 {
 }