remove duplicate.

Author: apex-omontgomery

pybot/endpoints/slack/messages.py

@@ -14,9 +14,7 @@ def create_endpoints(plugin):
     plugin.on_message(".*", message_deleted, subtype="message_deleted")
     plugin.on_message(".*\!tech", tech_tips)
     plugin.on_message(".*\<\!here\>", here_bad)
-    plugin.on_message(".*\<\!channel\>", here_bad)
-    plugin.on_message(".*\@here", here_bad)
-    plugin.on_message(".*\@channel", here_bad)
+    plugin.on_message(".*\<\!channel\>", here_bad)  
     plugin.on_message(".*@here", here_bad)
     plugin.on_message(".*@channel", here_bad)
     plugin.on_message(".*codervets", not_named)