Fix unused variable warnings (pytorch#4625)

Summary:
X-link: facebookresearch/FBGEMM#1663

In cases where AVX instructions are not available.

Pull Request resolved: pytorch#4625

Reviewed By: cthi

Differential Revision: D79417503

Pulled By: q10

fbshipit-source-id: 34cba1c3593a5868c742a1522129b7c325510060

Author: cyyever

src/GroupwiseConv.cc

@@ -882,13 +882,13 @@ template <typename processOutputType, typename outT, typename inT>
 static void dispatchOutputProcessing(
     const processOutputType& outProcess,
     int32_t* rowOffsetBuf,
-    outT* out,
-    const inT* inp,
-    const block_type_t& block,
-    int ld_out,
-    int ld_in,
+    outT* out [[maybe_unused]],
+    const inT* inp [[maybe_unused]],
+    const block_type_t& block [[maybe_unused]],
+    int ld_out [[maybe_unused]],
+    int ld_in [[maybe_unused]],
     int groups,
-    int C_per_G,
+    int C_per_G [[maybe_unused]],
     true_type /*unused*/) {
   constexpr QuantizationGranularity Q_GRAN = processOutputType::QGRANType;
   [[maybe_unused]] constexpr int FUSE_RELU = processOutputType::RELU_FUSED;