Use implicit slice start

Co-authored-by: Andrew Murray <[email protected]>

Author: Yay295

Tests/test_image.py

@@ -1010,7 +1010,7 @@ def test_roundtrip_bytes_method(self, mode):
     @pytest.mark.parametrize(("mode", "num_bands", "pixelsize"), image_modes_not_bgr)
     def test_pixels_after_getdata_putdata(self, mode, num_bands, pixelsize):
         image_byte_size = 2 * 2 * pixelsize
-        start_bytes = self.sample_bytes[0:image_byte_size]
+        start_bytes = self.sample_bytes[:image_byte_size]
         image = Image.frombytes(mode, (2, 2), start_bytes)
 
         start_pixels = (