test: don't exclude 6-connected from 3d vcg

Author: william-silversmith

automated_test.py

@@ -1514,12 +1514,6 @@ def test_color_connectivity_graph_8_uint32():
   assert np.all(cc_labels == ans)
 
 def test_color_connectivity_graph_6():
-
-  with pytest.raises(ValueError):
-    vcg = np.zeros([2,2,2], dtype=np.uint8, order="F")
-    cc3d.color_connectivity_graph(vcg, connectivity=6)
-
-
   vcg = np.zeros([10,10,10], dtype=np.uint32, order="F")
   vcg[:,:,:] = 0b11111111111111111111111111