TextEditor: Clean up BaseHoverHandler

Change-Id: Ie2f0c8c0a46377ae18ff4e31c7e43b1242cb7372
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/texteditor/basehoverhandler.cpp

@@ -26,19 +26,10 @@
 #include "basehoverhandler.h"
 #include "texteditor.h"
 
-#include <coreplugin/icore.h>
 #include <utils/tooltip/tooltip.h>
 
-#include <QPoint>
-
-using namespace Core;
-
 namespace TextEditor {
 
-BaseHoverHandler::BaseHoverHandler() : m_diagnosticTooltip(false), m_priority(-1)
-{
-}
-
 BaseHoverHandler::~BaseHoverHandler()
 {}