Valgrind: Random cleanups

Remove unneeded function arguments, Qt 5 connects etc.

Change-Id: I95faf80e7b5ccc574e2457b841f7913bc2aa05d3
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/valgrind/valgrindengine.cpp

@@ -65,13 +65,9 @@ ValgrindRunControl::ValgrindRunControl(RunConfiguration *runConfiguration, Core:
         m_settings = ValgrindPlugin::globalSettings();
 }
 
-ValgrindRunControl::~ValgrindRunControl()
-{
-}
-
 bool ValgrindRunControl::startEngine()
 {
-    emit starting(this);
+    emit starting();
 
     FutureProgress *fp = ProgressManager::addTimedTask(m_progress, progressTitle(), "valgrind", 100);
     fp->setKeepOnFinish(FutureProgress::HideOnFinish);