Gui: Fix warning about unused variable

src/Gui/GestureNavigationStyle.cpp

@@ -516,7 +516,6 @@ public:
             SbVec2s pos = ev.inventor_event->getPosition();
             auto &ns = this->outermost_context().ns;
             ns.spin_simplified(
-                        ns.viewer->getSoRenderManager()->getCamera(),
                         ns.normalizePixelPos(pos), ns.normalizePixelPos(this->base_pos));
             this->base_pos = pos;
         }

src/Gui/MayaGestureNavigationStyle.cpp

@@ -540,8 +540,7 @@ SbBool MayaGestureNavigationStyle::processSoEvent(const SoEvent * const ev)
                 } else {//one mouse button - normal spinning
                     //this will also handle the single-finger drag (there's no gesture used, pseudomouse is enough)
                     //this->addToLog(event->getPosition(), event->getTime());
-                    this->spin_simplified(viewer->getSoRenderManager()->getCamera(),
-                                          posn, prevnormalized);
+                    this->spin_simplified(posn, prevnormalized);
                     processed = true;
                 }
             }

src/Gui/NavigationStyle.cpp

@@ -954,7 +954,7 @@ void NavigationStyle::spin(const SbVec2f & pointerpos)
  * \param curpos  current normalized position or mouse pointer
  * \param prevpos  previous normalized position of mouse pointer
  */
-void NavigationStyle::spin_simplified(SoCamera* cam, SbVec2f curpos, SbVec2f prevpos)
+void NavigationStyle::spin_simplified(SbVec2f curpos, SbVec2f prevpos)
 {
     assert(this->spinprojector);
 

src/Gui/NavigationStyle.h

@@ -220,7 +220,7 @@ protected:
     void doRotate(SoCamera * camera, float angle, const SbVec2f& pos);
     void spin(const SbVec2f & pointerpos);
     SbBool doSpin();
-    void spin_simplified(SoCamera *cam, SbVec2f curpos, SbVec2f prevpos);
+    void spin_simplified(SbVec2f curpos, SbVec2f prevpos);
     void moveCursorPosition();
     void saveCursorPosition(const SoEvent * const ev);