swscale: remove unused code

yvu9ToYv12Wrapper() used to support yv12 with the chroma planes either in the
uv order or the vu order. FFmpeg no longer has a pixel format in vu order.

Originally committed as revision 32156 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/swscale.c

@@ -1599,17 +1599,10 @@ static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[
         }
     }
 
-    if (c->dstFormat==PIX_FMT_YUV420P || c->dstFormat==PIX_FMT_YUVA420P) {
         planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,
                  srcSliceH >> 2, srcStride[1], dstStride[1]);
         planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,
                  srcSliceH >> 2, srcStride[2], dstStride[2]);
-    } else {
-        planar2x(src[1], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,
-                 srcSliceH >> 2, srcStride[1], dstStride[2]);
-        planar2x(src[2], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,
-                 srcSliceH >> 2, srcStride[2], dstStride[1]);
-    }
     if (dst[3])
         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
     return srcSliceH;