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

This reverts commit c989133d27.

app/streaming/video/slvid.h

@@ -26,11 +26,6 @@ public:
         return false;
     }
 
-    // SLVideo cannot apply any window changes (nor do we expect any)
-    virtual bool applyWindowChange(int, int, int) override {
-        return false;
-    }
-
 private:
     static void slLogCallback(void* context, ESLVideoLog logLevel, const char* message);