Fix GCC compile

AlexeyAB

2018-08-16 c2a8cc2ad3f4b31243cbf577440ee45bafcc7f92

 src/crop_layer.h

@@ -2,7 +2,6 @@
#define CROP_LAYER_H

#include "image.h"
#include "params.h"
#include "layer.h"
#include "network.h"