message: remove batches_per_block in code gen
diff: @@ -61,7 +61,7 @@ struct StockhamKernel : public StockhamGeneratorSpecs
  }
  }
  - batches_per_block = LDS_BYTE_LIMIT / bytes_per_batch;
  + auto batches_per_block = LDS_BYTE_LIMIT / bytes_per_batch;
  while(threads_per_transform * batches_per_block > threads_per_block)
  --batches_per_block;
  if(!factors2d.empty())
  @@ -77,7 +77,6 @@ struct StockhamKernel : public StockhamGeneratorSpecs
  virtual ~StockhamKernel(){};
  unsigned int nregisters;
  - unsigned int batches_per_block;
  unsigned int transforms_per_block;
  // data that may be overridden by subclasses (different tiling types)
  