remove some more redundant code and fix a docstring issue

Author: keflavich

astroquery/wfau/core.py

@@ -127,8 +127,9 @@ def _verify_programme_id(self, pid, query_type='catalog'):
 
         Raises
         ------
-        ValueError if the pid is 'all' and the query type is a catalog.
-        You can query all surveys for images, but not all catalogs.
+        ValueError
+            If the pid is 'all' and the query type is a catalog.  You can query
+            all surveys for images, but not all catalogs.
         """
         if pid == 'all' and query_type == 'image':
             return 'all'
@@ -201,12 +202,6 @@ def get_images(self, coordinates, waveband='all', frame_type='stack',
         list : A list of `~astropy.io.fits.HDUList` objects.
         """
 
-        if database is None:
-            database = self.database
-
-        if programme_id is None:
-            programme_id = self.programme_id
-
         readable_objs = self.get_images_async(
             coordinates, waveband=waveband, frame_type=frame_type,
             image_width=image_width, image_height=image_height,