Clear scene before exiting wide_angle_camera_test (#266)

Signed-off-by: Ian Chen <[email protected]>

Author: iche033

include/gz/sensors/WideAngleCameraSensor.hh

@@ -138,12 +138,6 @@ namespace gz
       /// \return True on success.
       private: bool CreateCamera();
 
-      /// \brief Callback that is triggered when the scene changes on
-      /// the Manager.
-      /// \param[in] _scene Pointer to the new scene.
-      private: void OnSceneChange(gz::rendering::ScenePtr /*_scene*/)
-              { }
-
       GZ_UTILS_WARN_IGNORE__DLL_INTERFACE_MISSING
       /// \brief Data pointer for private data
       /// \internal

test/integration/wide_angle_camera.cc

@@ -217,7 +217,13 @@ void WideAngleCameraSensorTest::ImagesWithBuiltinSDF(
   EXPECT_GT(b, g);
   EXPECT_GT(b, r);
 
+  auto sensorId = sensor->Id();
+  EXPECT_TRUE(mgr.Remove(sensorId));
+  EXPECT_EQ(nullptr, mgr.Sensor(sensorId));
+
   // Clean up
+  box.reset();
+  blue.reset();
   engine->DestroyScene(scene);
   gz::rendering::unloadEngine(engine->Name());
 }