dnn(ocl4dnn): drop unused batch_size_ in pooling

modules/dnn/src/ocl4dnn/include/ocl4dnn.hpp

@@ -360,7 +360,6 @@ class OCL4DNNPool
 
         ocl4dnnPoolingMethod_t pool_method_;
         int32_t count_;
-        int32_t batch_size_;
         int32_t channels_;
         int32_t kernel_h_;
         int32_t kernel_w_;

modules/dnn/src/ocl4dnn/src/ocl4dnn_pool.cpp

@@ -54,7 +54,6 @@ OCL4DNNPool<Dtype>::OCL4DNNPool(OCL4DNNPoolConfig config)
     int dims = config.in_shape.size();
     int spatial_dims = 2;
 
-    batch_size_ = config.in_shape[0];
     channels_ = config.channels;
     pool_method_ = config.pool_method;
 
@@ -124,7 +123,6 @@ bool OCL4DNNPool<Dtype>::Forward(const UMat& bottom,
             oclk_max_pool_forward.args(
                 count_,
                 ocl::KernelArg::PtrReadOnly(bottom),
-                batch_size_,
                 channels_,
                 height_,
                 width_,
@@ -157,7 +155,6 @@ bool OCL4DNNPool<Dtype>::Forward(const UMat& bottom,
             oclk_ave_pool_forward.args(
                 count_,
                 ocl::KernelArg::PtrReadOnly(bottom),
-                batch_size_,
                 channels_,
                 height_,
                 width_,
@@ -188,7 +185,6 @@ bool OCL4DNNPool<Dtype>::Forward(const UMat& bottom,
             oclk_sto_pool_forward.args(
                 count_,
                 ocl::KernelArg::PtrReadOnly(bottom),
-                batch_size_,
                 channels_,
                 height_,
                 width_,

modules/dnn/src/opencl/ocl4dnn_pooling.cl

@@ -53,7 +53,7 @@ __kernel void
     TEMPLATE(max_pool_forward, Dtype)
 #endif
 (
-    const int nthreads, __global const Dtype* bottom_data, const int num,
+    const int nthreads, __global const Dtype* bottom_data,
     const int channels, const int height, const int width,
     const int pooled_height, const int pooled_width,
     __global Dtype* top_data
@@ -97,7 +97,7 @@ __kernel void
 #elif defined KERNEL_AVE_POOL
 
 __kernel void TEMPLATE(ave_pool_forward, Dtype)(
-    const int nthreads, __global const Dtype* const bottom_data, const int num,
+    const int nthreads, __global const Dtype* const bottom_data,
     const int channels, const int height, const int width,
     const int pooled_height, const int pooled_width,
     __global Dtype* top_data)
@@ -135,7 +135,7 @@ __kernel void TEMPLATE(ave_pool_forward, Dtype)(
 #elif defined KERNEL_STO_POOL
 
 __kernel void TEMPLATE(sto_pool_forward_test,Dtype)(
-    const int nthreads, __global const Dtype* const bottom_data, const int num,
+    const int nthreads, __global const Dtype* const bottom_data,
     const int channels, const int height, const int width,
     const int pooled_height, const int pooled_width,
     __global Dtype* top_data)