Merge pull request #2276 from pigletfly/master

Removed unused import

flask/json.py

@@ -13,7 +13,6 @@ import uuid
 from datetime import date
 from .globals import current_app, request
 from ._compat import text_type, PY2
-from .ctx import has_request_context
 
 from werkzeug.http import http_date
 from jinja2 import Markup