Revert "chunked encoding"

This reverts commit 2e94212886.

This didn't fix the problem, and caused other issues when using werkzeug
to execute httpbin, so let's remove it.  See also: #340

httpbin/core.py

@@ -42,23 +42,12 @@ ENV_COOKIES = (
     '__utmb'
 )
 
-
 def jsonify(*args, **kwargs):
     response = flask_jsonify(*args, **kwargs)
     if not response.data.endswith(b'\n'):
         response.data += b'\n'
     return response
 
-
-class InputTerminated:
-    def __init__(self, wsgi_app):
-        self.wsgi_app = wsgi_app
-
-    def __call__(self, environ, start_response):
-        environ['wsgi.input_terminated'] = True
-        return self.wsgi_app(environ, start_response)
-
-
 # Prevent WSGI from correcting the casing of the Location header
 BaseResponse.autocorrect_location_header = False
 
@@ -68,10 +57,6 @@ tmpl_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'templates')
 app = Flask(__name__, template_folder=tmpl_dir)
 app.debug = bool(os.environ.get('DEBUG'))
 
-# Support for chunked-encoding.
-app.wsgi_app = InputTerminated(app.wsgi_app)
-
-
 # Setup Flask-Common.
 common = Common(app)