gralloc: Remove unused variable

Signed-off-by: xNombre <kartapolska@gmail.com>
Change-Id: I3ff5ce83989f1cb4ee0f403e93a24e8669039fd2

display-commonsys-intf/gralloc/QtiGralloc.cpp

@@ -185,7 +185,6 @@ Error decodeYUVPlaneInfoMetadata(hidl_vec<uint8_t> &in, qti_ycbcr *out) {
   if (!in.size() || !out) {
     return Error::BAD_VALUE;
   }
-  qti_ycbcr *p = reinterpret_cast<qti_ycbcr *>(in.data());
   memcpy(out, in.data(), (YCBCR_LAYOUT_ARRAY_SIZE * sizeof(qti_ycbcr)));
   return Error::NONE;
 }