CppTools: Remove some pointless declarations

* Unneeded private declared constructors
* Q_DISABLE_COPY for classes deriving from QObject (not copyable)

Change-Id: I89669e8bb062cda16bab5812e2ac591f9dcf4af2
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

src/plugins/cpptools/cppeditoroutline.h

@@ -51,7 +51,6 @@ namespace CppTools {
 class CPPTOOLS_EXPORT CppEditorOutline : public QObject
 {
     Q_OBJECT
-    Q_DISABLE_COPY(CppEditorOutline)
 
 public:
     explicit CppEditorOutline(TextEditor::TextEditorWidget *editorWidget);