Removed duplicate test

[radarhere]

#6035 added a test covering the situation when RAQM is requested but unavailable.

Pillow/Tests/test_imagefont.py

Lines 1027 to 1037 in 9e6537d

	def test_raqm_missing_warning(monkeypatch):
	monkeypatch.setattr(ImageFont.core, "HAVE_RAQM", False)
	with pytest.warns(UserWarning) as record:
	font = ImageFont.truetype(
	FONT_PATH, FONT_SIZE, layout_engine=ImageFont.Layout.RAQM
	)
	assert font.layout_engine == ImageFont.Layout.BASIC
	assert str(record[-1].message) == (
	"Raqm layout was requested, but Raqm is not available. "
	"Falling back to basic layout."
	)

Turns out, we already had a test for this.

Pillow/Tests/test_imagefont.py

Lines 91 to 102 in 9e6537d

	def test_unavailable_layout_engine(self):
	have_raqm = ImageFont.core.HAVE_RAQM
	ImageFont.core.HAVE_RAQM = False
	try:
	ttf = ImageFont.truetype(
	FONT_PATH, FONT_SIZE, layout_engine=ImageFont.Layout.RAQM
	)
	finally:
	ImageFont.core.HAVE_RAQM = have_raqm
	assert ttf.layout_engine == ImageFont.Layout.BASIC

This PR removes the original. The new one appears better as it makes use of monkeypatching.