Fixing comment and typo

Author: mmerce

bigml/evaluation.py

@@ -14,7 +14,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-"""An local Evaluation object.
+"""A local Evaluation object.
 
 This module defines a local class to handle the results of an evaluation
 

bigml/modelfields.py

@@ -241,7 +241,6 @@ def add_terms(self, categories=False, numerics=False):
                     self.fields[field_id]["summary"]["categories"]:
                 self.categories[field_id] = [category for \
                     [category, _] in field['summary']['categories']]
-                # del self.fields[field_id]["summary"]["categories"]
             if field['optype'] == 'datetime' and \
                     hasattr(self, "coeff_ids"):
                 self.coeff_id = [coeff_id for coeff_id in self.coeff_ids \