code cleanup- removed unused imports and rearranged import statements to match convention

tasks.py

-from celery import Celery
-import time
-from flask_socketio import SocketIO
-import subprocess
 import vars
 import sys
 import json
+import time
+
+from celery import Celery
+from flask_socketio import SocketIO
 
 sys.path.append('/cm/shared/rabbitmq_agents/')
 import rc_util
 
-from gevent import monkey
-monkey.patch_all(subprocess=True)
-
 broker_url = vars.broker_url
 celery = Celery('flask_user_reg', broker=broker_url)