remove mock (#2096)

.travis.yml

@@ -25,7 +25,6 @@ before_install:
     fi
   - pip install future
   - pip install pytest pytest-cov codecov
-  - pip install mock
   - pip install typing
   - |
     if [[ $TRAVIS_PYTHON_VERSION == 3.6 ]]; then

packaging/torchvision/meta.yaml

@@ -43,7 +43,6 @@ test:
   requires:
     - pytest
     - scipy
-    - mock
     - av
     - ca-certificates
     {{ environ.get('CONDA_TYPING_CONSTRAINT') }}

packaging/windows/internal/test.bat

@@ -8,7 +8,7 @@ set PYTHON_VERSION=%PYTHON_PREFIX:py=cp%
 if "%BUILD_VISION%" == "" (
     pip install future pytest coverage hypothesis protobuf
 ) ELSE (
-    pip install future pytest "pillow>=4.1.1" mock
+    pip install future pytest "pillow>=4.1.1"
 )
 
 for /F "delims=" %%i in ('where /R %SRC_DIR%\output *%MODULE_NAME%*%PYTHON_VERSION%*.whl') do pip install "%%i"

test/test_datasets.py

 import sys
 import os
 import unittest
-import mock
+from unittest import mock
 import numpy as np
 import PIL
 from PIL import Image

test/test_transforms.py

 import os
-import mock
 import torch
 import torchvision.transforms as transforms
 import torchvision.transforms.functional as F