De-qobjectify BaseHoverHandler and derivatives

Change-Id: I9bc1d849349f85b5c7fd6013396b8b15b6cb1568
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/qmakeprojectmanager/profilehoverhandler.h

@@ -37,8 +37,6 @@ namespace Internal {
 
 class ProFileHoverHandler : public TextEditor::BaseHoverHandler
 {
-    Q_OBJECT
-
 public:
     explicit ProFileHoverHandler(const TextEditor::Keywords &keywords);