dxva2_h264: Remove an unused variable

This was introduced by mistake in 39cdbb12 (only one of the
added variables were really needed).
Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/dxva2_h264.c

@@ -166,7 +166,6 @@ static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *
 static void fill_scaling_lists(const AVCodecContext *avctx, AVDXVAContext *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm)
 {
     unsigned i, j;
-    const SPS *sps = h->ps.sps;
     const PPS *pps = h->ps.pps;
     memset(qm, 0, sizeof(*qm));
     if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {