Remove all references to datadog from our code.

common/djangoapps/track/tracker.py

@@ -22,7 +22,6 @@ import inspect
 from importlib import import_module
 
 from django.conf import settings
-from dogapi import dog_stats_api
 
 from track.backends import BaseBackend
 
@@ -81,17 +80,14 @@ def _instantiate_backend_from_name(name, options):
     return backend
 
 
-@dog_stats_api.timed('track.send')
 def send(event):
     """
     Send an event object to all the initialized backends.
 
     """
-    dog_stats_api.increment('track.send.count')
 
     for name, backend in backends.iteritems():
-        with dog_stats_api.timer('track.send.backend.{0}'.format(name)):
-            backend.send(event)
+        backend.send(event)
 
 
 _initialize_backends_from_django_settings()