Clean up country docs (left-over from #4027)

gratipay/models/country.py

@@ -7,12 +7,9 @@ class Country(Model):
     """Represent country records from our database (read-only).
 
     :var int id: the record's primary key in our ``countries`` table
-    :var unicode name: the name of the country
-    :var unicode code2: the country's `ISO 3166-1 alpha-2`_ code
-    :var unicode code3: the country's `ISO 3166-1 alpha-3`_ code
+    :var unicode code: the country's `ISO 3166-1 alpha-2`_ code
 
     .. _ISO 3166-1 alpha-2 : https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
-    .. _ISO 3166-1 alpha-3 : https://en.wikipedia.org/wiki/ISO_3166-1_alpha-3
 
     """
     typname = 'countries'