Remove unused import and clean control flow

Author: keyan

flask/wrappers.py

@@ -13,7 +13,7 @@
 from werkzeug.exceptions import BadRequest
 
 from . import json
-from .globals import _request_ctx_stack, current_app
+from .globals import _request_ctx_stack
 
 _missing = object()
 
@@ -175,9 +175,8 @@ def on_json_loading_failed(self, e):
         .. versionadded:: 0.8
         """
         ctx = _request_ctx_stack.top
-        if ctx is not None:
-            if ctx.app.config.get('DEBUG', False):
-                raise BadRequest('Failed to decode JSON object: {0}'.format(e))
+        if ctx is not None and ctx.app.config.get('DEBUG', False):
+            raise BadRequest('Failed to decode JSON object: {0}'.format(e))
         raise BadRequest()
 
     def _load_form_data(self):