Remove six dependency

flask/testsuite/blueprints.py

@@ -13,10 +13,10 @@ import flask
 import unittest
 import warnings
 from flask.testsuite import FlaskTestCase, emits_module_deprecation_warning
+from flask._compat import text_type
 from werkzeug.exceptions import NotFound
 from werkzeug.http import parse_cache_control_header
 from jinja2 import TemplateNotFound
-import six
 
 
 # import moduleapp here because it uses deprecated features and we don't
@@ -303,7 +303,7 @@ class BlueprintTestCase(FlaskTestCase):
 
         @bp.route('/bar')
         def bar(bar):
-            return six.text_type(bar)
+            return text_type(bar)
 
         app = flask.Flask(__name__)
         app.register_blueprint(bp, url_prefix='/1', url_defaults={'bar': 23})