Revert "Allow renderers to apply size and display changes seamlessly"

This reverts commit c989133d27.

app/streaming/video/ffmpeg-renderers/renderer.h

@@ -167,12 +167,6 @@ public:
         return true;
     }
 
-    virtual bool applyWindowChange(int, int, int) {
-        // By default, we cannot apply any changes. The renderer
-        // will be recreated after any window change.
-        return false;
-    }
-
     virtual AVPixelFormat getPreferredPixelFormat(int videoFormat) {
         if (videoFormat == VIDEO_FORMAT_H265_MAIN10) {
             // 10-bit YUV 4:2:0