Fixes GraphicsGem Template Compilation

The existing GraphicsGem Template was calling a pair of
obsolete function in the controller class:
`m_controller.EnableFeatureProcessor(GetEntityId());`
and
`m_controller.DisableFeatureProcessor();`

The fix was to simply remove the declaration
and implementation of the override:
`void OnEntityVisibilityChanged(bool visibility) override;`

Signed-off-by: galibzon <[email protected]>

Author: galibzon

Templates/GraphicsGem/Template/Code/Source/Tools/Components/Editor${Name}Component.cpp

@@ -86,15 +86,4 @@ namespace ${Name}
         }
     }
 
-    void Editor${Name}Component::OnEntityVisibilityChanged(bool visibility)
-    {
-        if (visibility)
-        {
-            m_controller.EnableFeatureProcessor(GetEntityId());
-        }
-        else
-        {
-            m_controller.DisableFeatureProcessor();
-        }
-    }
 }

Templates/GraphicsGem/Template/Code/Source/Tools/Components/Editor${Name}Component.h

@@ -43,10 +43,6 @@ namespace ${Name}
         void Activate() override;
         void Deactivate() override;
 
-    protected:
-
-        void OnEntityVisibilityChanged(bool visibility) override;
-
     private:
 
         // AZ::TickBus overrides