fix #2961 (#3095)

src/layer/arm/innerproduct_arm.cpp

@@ -44,8 +44,6 @@ InnerProduct_arm::InnerProduct_arm()
 
 int InnerProduct_arm::create_pipeline(const Option& opt)
 {
-#if __ARM_NEON
-    if (opt.use_packing_layout || opt.use_int8_inference)
     {
         flatten = ncnn::create_layer(ncnn::LayerType::Flatten);
 
@@ -55,7 +53,6 @@ int InnerProduct_arm::create_pipeline(const Option& opt)
 
         flatten->create_pipeline(opt);
     }
-#endif // __ARM_NEON
 
 #if NCNN_INT8
     if (opt.use_int8_inference && weight_data.elemsize == (size_t)1u)