Fix lint

Author: fmassa

torchvision/csrc/ROIPool.h

@@ -65,7 +65,6 @@ at::Tensor ROIPool_backward(
       width);
 }
 
-
 using namespace at;
 using torch::Tensor;
 using torch::autograd::AutogradContext;

torchvision/csrc/vision.cpp

@@ -27,7 +27,6 @@ PyMODINIT_FUNC PyInit__custom_ops(void) {
 #endif
 #endif
 
-
 int64_t _cuda_version() {
 #ifdef WITH_CUDA
   return CUDA_VERSION;

torchvision/extension.py

@@ -1,5 +1,6 @@
 _HAS_OPS = False
 
+
 def _register_extensions():
     import os
     import imp
@@ -10,6 +11,7 @@ def _register_extensions():
     _, path, _ = imp.find_module("_C", [lib_dir])
     torch.ops.load_library(path)
 
+
 try:
     _register_extensions()
     _HAS_OPS = True
@@ -44,4 +46,5 @@ def _check_cuda_version():
                                .format(t_major, t_minor, tv_major, tv_minor))
     return _version
 
+
 _check_cuda_version()