Add a missing import, remove some unused ones

pokedex/db/load.py

@@ -4,7 +4,6 @@ import fnmatch
 import os.path
 import sys
 
-from sqlalchemy.orm.attributes import instrumentation_registry
 import sqlalchemy.sql.util
 import sqlalchemy.types
 

pokedex/db/markdown.py

@@ -14,7 +14,6 @@ from __future__ import absolute_import
 import re
 
 import markdown
-import sqlalchemy.types
 from sqlalchemy.orm.session import object_session
 
 class MarkdownString(object):

pokedex/tests/test_strings.py

@@ -1,6 +1,7 @@
 # Encoding: UTF-8
 
 import pytest
+from sqlalchemy.orm.exc import NoResultFound
 
 from pokedex.tests import positional_params