ZSQLCatalog: Drop compatibility support for "operator" argument.

product/ZSQLCatalog/Query/ComplexQuery.py

@@ -55,9 +55,6 @@ class ComplexQuery(Query):
         Default: 'and'
 
       Deprecated
-        operator ('and', 'or', 'not')
-          See logical_operator.
-          logical_operator takes precedence if given.
         unknown_column_dict (dict)
           Only one key of this dictionnary is used here:
             key: 'from_expression'
@@ -66,7 +63,7 @@ class ComplexQuery(Query):
             provided, this ComplexQuery must have no subquery (regular
             SQLExpression limitation)
     """
-    self.logical_operator = kw.pop('logical_operator', kw.pop('operator', 'and')).lower()
+    self.logical_operator = kw.pop('logical_operator', 'and').lower()
     assert self.logical_operator in ('and', 'or', 'not'), self.logical_operator
     unknown_column_dict = kw.pop('unknown_column_dict', {})
     self.from_expression = unknown_column_dict.pop('from_expression', None)