Remove outdated TODO

This todo isn't in the correct place. We could make the loading discover
the drivers in __init__, but there isn't enough gain to bother at this
point. We might want to look at doing drivers as entrypoints in the
future.

Change-Id: If5d8ec54f5f447c4dcb41c588f5ffa5582196e23
diff --git a/zuul/lib/connections.py b/zuul/lib/connections.py
index 9964ba9..3bed92b 100644
--- a/zuul/lib/connections.py
+++ b/zuul/lib/connections.py
@@ -69,7 +69,6 @@
 
     def configure(self, config):
         # Register connections from the config
-        # TODO(jhesketh): import connection modules dynamically
         connections = {}
 
         for section_name in config.sections():