Remove test_pattern_resize test

Unlike `cairocffi.ImageSurface.create_from_png`, using `cairocffi.pixbuf.decode_to_image_surface` automatically resizes
the image to the provided dimensions. There is therefore no need to
check transformation matrices.

test/test_images.py

@@ -122,19 +122,6 @@ def test_pattern(self, path_n_bytes_image):
         img = images.Img(bytes_image)
         assert isinstance(img.pattern, cairocffi.SurfacePattern)
 
-    def test_pattern_resize(self, path_n_bytes_image_pngs):
-        path, bytes_image = path_n_bytes_image_pngs
-        img = images.Img.from_path(path)
-        assert isinstance(img.pattern, cairocffi.SurfacePattern)
-        t_matrix = img.pattern.get_matrix().as_tuple()
-        assert_approx_equal(t_matrix, (1.0, 0.0, 0.0, 1.0))
-        img.width = 2.0 * img.default_size.width
-        t_matrix = img.pattern.get_matrix().as_tuple()
-        assert_approx_equal(t_matrix, (0.5, 0.0, 0.0, 1.0))
-        img.height = 3.0 * img.default_size.height
-        t_matrix = img.pattern.get_matrix().as_tuple()
-        assert_approx_equal(t_matrix, (0.5, 0.0, 0.0, 1.0 / 3.0))
-
     def test_pattern_rotate(self, path_n_bytes_image):
         path, bytes_image = path_n_bytes_image
         img = images.Img(bytes_image)