fix onnx2ncnn adaptive pool conversion bug, remove no used weights node (#2570)

src/layer/arm/pooling_arm.cpp

@@ -42,7 +42,7 @@ Pooling_arm::Pooling_arm()
     support_bf16_storage = true;
 }
 
-int Pooling_arm::create_pipeline(const Option& _opt)
+int Pooling_arm::create_pipeline(const Option& /*opt*/)
 {
     if (adaptive_pooling)
     {

tools/onnx/onnx2ncnn.cpp

@@ -2270,6 +2270,13 @@ int main(int argc, char** argv)
                 node_reference[node.input(1)] -= 1;
             }
         }
+        else if (op == "adaptive_avg_pool2d" || op == "adaptive_max_pool2d")
+        {
+            if (node.input_size() >= 2)
+            {
+                node_reference[node.input(1)] -= 1;
+            }
+        }
     }
 
     //         for (auto a: node_reference)