Revert the SQLALCHEMY config changes on staging

SQL Alchemy config changes were made to decrease the downtime of the
application. The last test only had 1 min of downtime in the upgrade
period i.e. 40 mins. Reverting the changes so that the same process
can be followed to ensure the changes had the desired effect.

app/config.py

@@ -414,8 +414,6 @@ class Staging(Config):
     API_RATE_LIMIT_ENABLED = True
     CHECK_PROXY_HEADER = True
     REDIS_ENABLED = True
-    SQLALCHEMY_POOL_TIMEOUT = 30
-    SQLALCHEMY_POOL_RECYCLE = 300
 
     API_KEY_LIMITS = {
         KEY_TYPE_TEAM: {