Removed unused access for I;32L and I;32B

[radarhere]

Access.c currently allows you to access data in I;32L and I;32B image modes.

Pillow/src/libImaging/Access.c

Lines 177 to 178 in 6d6f049

	ADD("I;32L", get_pixel_32L, put_pixel_32L);
	ADD("I;32B", get_pixel_32B, put_pixel_32B);

However, the only other place these modes (not rawmodes) exist is in ImageMode.py, so this access serves no purpose.

In simpler terms, you can't create an image in these modes, so we never need to access pixel data in them.

>>> from PIL import Image
>>> Image.new("I;32B", (1, 1))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "PIL/Image.py", line 3101, in new
    return im._new(core.fill(mode, size, color))
ValueError: unrecognized image mode
>>> Image.new("I;32L", (1, 1))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "PIL/Image.py", line 3101, in new
    return im._new(core.fill(mode, size, color))
ValueError: unrecognized image mode