1 files changed, 0 insertions, 71 deletions
diff --git a/synapse/util/debug.py b/synapse/util/debug.py
deleted file mode 100644
index dc49162e6a..0000000000
--- a/synapse/util/debug.py
+++ /dev/null
@@ -1,71 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright 2015, 2016 OpenMarket Ltd
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from twisted.internet import defer, reactor
-from functools import wraps
-from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
-
-
-def debug_deferreds():
-    """Cause all deferreds to wait for a reactor tick before running their
-    callbacks. This increases the chance of getting a stack trace out of
-    a defer.inlineCallback since the code waiting on the deferred will get
-    a chance to add an errback before the deferred runs."""
-
-    # Helper method for retrieving and restoring the current logging context
-    # around a callback.
-    def with_logging_context(fn):
-        context = LoggingContext.current_context()
-
-        def restore_context_callback(x):
-            with PreserveLoggingContext(context):
-                return fn(x)
-
-        return restore_context_callback
-
-    # We are going to modify the __init__ method of defer.Deferred so we
-    # need to get a copy of the old method so we can still call it.
-    old__init__ = defer.Deferred.__init__
-
-    # We need to create a deferred to bounce the callbacks through the reactor
-    # but we don't want to add a callback when we create that deferred so we
-    # we create a new type of deferred that uses the old __init__ method.
-    # This is safe as long as the old __init__ method doesn't invoke an
-    # __init__ using super.
-    class Bouncer(defer.Deferred):
-        __init__ = old__init__
-
-    # We'll add this as a callback to all Deferreds. Twisted will wait until
-    # the bouncer deferred resolves before calling the callbacks of the
-    # original deferred.
-    def bounce_callback(x):
-        bouncer = Bouncer()
-        reactor.callLater(0, with_logging_context(bouncer.callback), x)
-        return bouncer
-
-    # We'll add this as an errback to all Deferreds. Twisted will wait until
-    # the bouncer deferred resolves before calling the errbacks of the
-    # original deferred.
-    def bounce_errback(x):
-        bouncer = Bouncer()
-        reactor.callLater(0, with_logging_context(bouncer.errback), x)
-        return bouncer
-
-    @wraps(old__init__)
-    def new__init__(self, *args, **kargs):
-        old__init__(self, *args, **kargs)
-        self.addCallbacks(bounce_callback, bounce_errback)
-
-    defer.Deferred.__init__ = new__init__