Fix numpy12; remove astrodev

Author: jdavies-st

tox.ini

@@ -11,15 +11,15 @@ deps=
     # Newer versions of gwcs require astropy 4.x, which
     # isn't compatible with the older versions of numpy
     # that we test with.
-    py35: gwcs==0.9.1
+    py35,numpy12: gwcs==0.9.1
     legacy: semantic_version==2.8
     legacy: pyyaml==3.10
     legacy: jsonschema==3.0.2
     legacy: numpy~=1.10.0
     numpy11,numpy12,legacy: astropy~=3.0.0
     numpy11: numpy==1.11
-    numpy12: numpy==1.12, gwcs==0.9.1
-    numpydev,astrodev,s390x: cython
+    numpy12: numpy==1.12
+    numpydev,s390x: cython
 extras= all,tests
 # astropy will complain if the home directory is missing
 passenv= HOME