switch memcached from tcp to unix domain socket

installer/roles/kubernetes/templates/configmap.yml.j2

@@ -192,16 +192,6 @@ data:
     LOGGING['handlers']['system_tracking_migrations'] = {'class': 'logging.NullHandler'}
     LOGGING['handlers']['management_playbooks'] = {'class': 'logging.NullHandler'}
 
-    CACHES = {
-        'default': {
-            'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
-            'LOCATION': 'unix:/var/run/memcached/memcached.sock'
-        },
-        'ephemeral': {
-            'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
-        },
-    }
-
     USE_X_FORWARDED_PORT = True
 
     AWX_CONTAINER_GROUP_DEFAULT_IMAGE = "{{ container_groups_image }}"

installer/roles/kubernetes/templates/environment.sh.j2

@@ -3,5 +3,3 @@ DATABASE_NAME={{ pg_database }}
 DATABASE_HOST={{ pg_hostname|default('postgresql') }}
 DATABASE_PORT={{ pg_port|default('5432') }}
 DATABASE_PASSWORD={{ pg_password | quote }}
-MEMCACHED_HOST={{ memcached_hostname|default('localhost') }}
-MEMCACHED_PORT={{ memcached_port|default('11211') }}