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

This reverts commit c989133d27.

app/streaming/video/ffmpeg.cpp

@@ -68,11 +68,6 @@ void FFmpegVideoDecoder::setHdrMode(bool enabled)
     m_FrontendRenderer->setHdrMode(enabled);
 }
 
-bool FFmpegVideoDecoder::applyWindowChange(int width, int height, int flags)
-{
-    return m_FrontendRenderer->applyWindowChange(width, height, flags);
-}
-
 int FFmpegVideoDecoder::getDecoderCapabilities()
 {
     int capabilities = m_BackendRenderer->getDecoderCapabilities();