fix warnings

src/map/map.cpp

@@ -532,13 +532,8 @@ void Map::prepare() {
         transform.updateTransitions(animationTime);
     }
 
-    const TransformState oldState = state;
     state = transform.currentState();
 
-    bool pixelRatioChanged = oldState.getPixelRatio() != state.getPixelRatio();
-    bool dimensionsChanged = oldState.getFramebufferWidth() != state.getFramebufferWidth() ||
-                             oldState.getFramebufferHeight() != state.getFramebufferHeight();
-
     animationTime = util::now();
     updateSources();
     style->updateProperties(state.getNormalizedZoom(), animationTime);