libvpx: Pull from upstream

source/libvpx/vp8/common/x86/vp8_variance_sse2.c

Index: source/libvpx/vp8/common/x86/vp8_variance_sse2.c
diff --git a/source/libvpx/vp8/common/x86/vp8_variance_sse2.c b/source/libvpx/vp8/common/x86/vp8_variance_sse2.c
index f6dfb27871db78bbe7b845e5a193b6de755c0f85..1c15ed8809766fcbfd2526ce499e600dce5a675d 100644
--- a/source/libvpx/vp8/common/x86/vp8_variance_sse2.c
+++ b/source/libvpx/vp8/common/x86/vp8_variance_sse2.c
@@ -238,20 +238,6 @@ unsigned int vp8_sub_pixel_variance16x16_wmt
     return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 8));
 }
 
-unsigned int vp8_sub_pixel_mse16x16_wmt(
-    const unsigned char  *src_ptr,
-    int  src_pixels_per_line,
-    int  xoffset,
-    int  yoffset,
-    const unsigned char *dst_ptr,
-    int dst_pixels_per_line,
-    unsigned int *sse
-)
-{
-    vp8_sub_pixel_variance16x16_wmt(src_ptr, src_pixels_per_line, xoffset, yoffset, dst_ptr, dst_pixels_per_line, sse);
-    return *sse;
-}
-
 unsigned int vp8_sub_pixel_variance16x8_wmt
 (
     const unsigned char  *src_ptr,