Revert "Add support for autoeviction of slow nodes."

This reverts commit b96f7120c4.

Change-Id: Ib4693541bfae854a2f15323d8e114fedc057c2e6

config.yaml

@@ -358,16 +358,3 @@ options:
       control message will be sent.  The fc_limit defaults to 16 transactions.
       This effectively means that this is as far as a given node can be behind
       committing transactions from the cluster.
-  autoevict:
-    type: int
-    default: 0
-    description: |
-      Number of entries allowed on delayed list until auto eviction takes place.
-      Setting value to 0 disables auto eviction. This setting enables autoeviction
-      of slow nodes. Implies 'evs.version=1'.
-      Related STATUS variables:
-      .
-      'wsrep_evs_delayed': Comma separated list of nodes that are considered delayed.
-                           The node format is <uuid>:<address>:<count>, where <count>
-                           is the number of entries on delayed list for that node.
-      'wsrep_evs_evict_list': List of UUIDs of the evicted nodes.

hooks/percona_utils.py

@@ -1071,11 +1071,6 @@ def get_wsrep_provider_options():
     if config('gcs-fc-limit') is not None:
         wsrep_provider_options.append(
             'gcs.fc_limit={}'.format(config('gcs-fc-limit')))
-    if config('autoevict') is not None:
-        wsrep_provider_options.append(
-            'evs.auto_evict={}'.format(config('autoevict')))
-        wsrep_provider_options.append(
-            'evs.version=1')
 
     peer_timeout = config('peer-timeout')
     if peer_timeout and(not peer_timeout.startswith('PT') or