Removed print statement from tests

[radarhere]

The following test function

Pillow/Tests/test_imagemath.py

Lines 6 to 12 in f63cc58

	def pixel(im):
	if hasattr(im, "im"):
	return f"{im.mode} {repr(im.getpixel((0, 0)))}"
	else:
	if isinstance(im, int):
	return int(im) # hack to deal with booleans
	print(im)

is used like so

Pillow/Tests/test_imagemath.py

Line 30 in f63cc58

assert pixel(ImageMath.eval("A+B", A=A, B=B)) == "I 3"

If the print statement is reached, then the assertion will fail anyway, so it is just debugging code. This PR removes it.