Revert "Adds simplejson as a testing target." (#1865)

tests/test_helpers.py

@@ -19,10 +19,6 @@ from werkzeug.exceptions import BadRequest
 from werkzeug.http import parse_cache_control_header, parse_options_header
 from werkzeug.http import http_date
 from flask._compat import StringIO, text_type
-try:
-    import simplejson
-except ImportError:
-    import json as simplejson
 
 
 def has_encoding(name):
@@ -118,10 +114,6 @@ class TestJSON(object):
             assert rv.mimetype == 'application/json'
             assert flask.json.loads(rv.data) == d
 
-    def test_simplejson_does_not_escape_slashes(self):
-        """Test that \\/ is no longer standard behavior."""
-        assert '\\/' not in simplejson.dumps('/')
-
     def test_jsonify_dicts(self):
         """Test jsonify with dicts and kwargs unpacking."""
         d = dict(