Utils: remove needless const

'Unconst' the bool parameter of signal
Utils::SubmitEditorWidget::submitActionEnabledChanged(bool)

Change-Id: Icc36c8954e82758ace906b3cf59d3522bfae7717
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/libs/utils/submiteditorwidget.h

@@ -116,7 +116,7 @@ signals:
     void diffSelected(const QStringList &);
     void fileSelectionChanged(bool someFileSelected);
     void submitActionTextChanged(const QString &);
-    void submitActionEnabledChanged(const bool);
+    void submitActionEnabledChanged(bool);
 
 private slots:
     void updateCheckAllComboBox();