Remove unused fields from SwsContext.

git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@30095 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale_internal.h

@@ -80,7 +80,6 @@ typedef struct SwsContext {
     int lumXInc, chrXInc;
     int lumYInc, chrYInc;
     enum PixelFormat dstFormat, srcFormat;  ///< format 4:2:0 type is always YV12
-    int origDstFormat, origSrcFormat;       ///< format
     int chrSrcHSubSample, chrSrcVSubSample;
     int chrDstHSubSample, chrDstVSubSample;
     int vChrDrop;