Remove unused property of video player

Source/Engine/Video/MF/VideoBackendMF.cpp

@@ -82,7 +82,6 @@ namespace MF
                 player.Width = videoArea.Area.cx;
                 player.Height = videoArea.Area.cy;
             }
-            player.AvgVideoBitRate = MFGetAttributeUINT32(mediaType, MF_MT_AVG_BITRATE, 0);
             uint64_t fpsValue;
             hr = mediaType->GetUINT64(MF_MT_FRAME_RATE, &fpsValue);
             if (SUCCEEDED(hr))

Source/Engine/Video/Types.h

@@ -32,7 +32,7 @@ struct VideoBackendPlayer
     Char* DebugUrl;
     int32 DebugUrlLen;
 #endif
-    int32 Width, Height, AvgVideoBitRate, FramesCount;
+    int32 Width, Height, FramesCount;
     int32 VideoFrameWidth, VideoFrameHeight;
     PixelFormat Format;
     float FrameRate;