Remove widget pointer from SteamVRTabController

The pointer is not needed and is an anti pattern.

src/tabcontrollers/SteamVRTabController.cpp

@@ -13,11 +13,9 @@ void SteamVRTabController::initStage1()
     reloadSteamVRProfiles();
 }
 
-void SteamVRTabController::initStage2( OverlayController* var_parent,
-                                       QQuickWindow* var_widget )
+void SteamVRTabController::initStage2( OverlayController* var_parent )
 {
     this->parent = var_parent;
-    this->widget = var_widget;
 }
 
 void SteamVRTabController::eventLoopTick()

src/tabcontrollers/SteamVRTabController.h

@@ -44,7 +44,6 @@ class SteamVRTabController : public QObject
 
 private:
     OverlayController* parent;
-    QQuickWindow* widget;
 
     float m_superSampling = 1.0;
     bool m_motionSmoothing = true;
@@ -61,7 +60,7 @@ private:
 
 public:
     void initStage1();
-    void initStage2( OverlayController* parent, QQuickWindow* widget );
+    void initStage2( OverlayController* parent );
 
     void eventLoopTick();