Remove the raw subset test

It won't work for lsst data which has separate amps and whether
it works or not is dependent on the raw formatter in use.
Easier to remove the test for now.

python/lsst/obs/base/butler_tests.py

@@ -210,17 +210,6 @@ def test_raw_header_wcs(self):
         wcs = self.butler.get("raw_header_wcs", self.dataIds["raw"])
         self.assertEqual(wcs, self.butler_get_data.raw_header_wcs)
 
-    @unittest.skip("Cannot test this. Raw data can not reliably have bbox requested.")
-    def test_raw_sub_bbox(self):
-        # Gen2 variant only. Gen3 will never support this.
-        self._require_gen2()
-        exp = self.butler.get("raw", self.dataIds["raw"], immediate=True)
-        bbox = exp.getBBox()
-        bbox.grow(-1)
-        sub = self.butler.get("raw_sub", self.dataIds["raw"], bbox=bbox, immediate=True)
-        self.assertEqual(sub.getImage().getBBox(), bbox)
-        self.assertImagesEqual(sub, exp.Factory(exp, bbox))
-
     def test_subset_raw(self):
         for kwargs, expect in self.butler_get_data.raw_subsets:
             if self._is_gen3():