Add the ability to add multiple ModelGeometry's for a RenderableModel to show models with multiple OBJ files without needing to create multiple scene graph nodes

modules/spacecraftinstruments/rendering/renderablemodelprojection.h

@@ -65,7 +65,6 @@ public:
     static documentation::Documentation Documentation();
 
 private:
-    bool loadTextures();
     void attitudeParameters(double time);
     void imageProjectGPU(const ghoul::opengl::Texture& projectionTexture);