title: table manager does not purge chunk in loki 2.4
body: <p>I wanted to have a deletion of chunk data older than 31 days so I made such config</p>
  <pre class="lang-yaml prettyprint-override"><code>schema_config:
    configs:
      - from: 2020-10-24
        store: boltdb-shipper
        object_store: filesystem
        schema: v11
        index:
          prefix: index_
          period: 24h
  
  storage_config:
    boltdb_shipper:
      active_index_directory: &quot;/var/lib/loki/boltdb-shipper-active&quot;
      cache_location: &quot;/var/lib/loki/boltdb-shipper-cache&quot;
      cache_ttl: 24h 
      shared_store: filesystem
    filesystem:
      directory: /var/lib/loki/chunks
  
  chunk_store_config:
    max_look_back_period: 0s
  
  table_manager:
    retention_deletes_enabled: true
    retention_period: 31d
  </code></pre>
  <p>but actually the deletion never happen.</p>
  <p>did I forget something in the configuration ?</p>
  <p>loki version: <code>2.4.1</code></p>