Remove unused global site_config

Author: Jeff Ammons

rtmbot/__init__.py

@@ -1,3 +1 @@
 from core import *
-
-site_config = {}

rtmbot/core.py

@@ -14,8 +14,6 @@ class RtmBot(object):
     def __init__(self, config):
         # set the config object
         self.config = config
-        global site_config
-        site_config = self.config
 
         # set slack token
         self.token = config.get('SLACK_TOKEN')