Remove legacy datasets from the wheel

Author: mkcor

src/skimage/data/README.txt

@@ -11,43 +11,3 @@ py3.install_sources(
   pure: false,             # Will be installed next to binaries
   subdir: 'skimage/data'  # Folder relative to site-packages to install to
 )
-
-py3.install_sources([
-  # Legacy datasets which are still included in the wheel
-  'README.txt',
-  'astronaut.png',
-  'brick.png',
-  'camera.png',
-  'chessboard_GRAY.png',
-  'chessboard_RGB.png',
-  'chelsea.png',
-  'clock_motion.png',
-  'coffee.png',
-  'coins.png',
-  'color.png',
-  'cell.png',
-  'grass.png',
-  'gravel.png',
-  'horse.png',
-  'hubble_deep_field.jpg',
-  'ihc.png',
-  'lbpcascade_frontalface_opencv.xml',
-  'lfw_subset.npy',
-  'logo.png',
-  'microaneurysms.png',
-  'moon.png',
-  'multipage.tif',
-  'multipage_rgb.tif',
-  'no_time_for_that_tiny.gif',
-  'page.png',
-  'text.png',
-  'retina.jpg',
-  'rocket.jpg',
-  'phantom.png',
-  'motorcycle_disp.npz',
-  'motorcycle_left.png',
-  'motorcycle_right.png',
-  ],
-  pure: false,
-  subdir: 'skimage/data'
-)