drop persist all variable in docs (#839)

content/en/references/configuration.md

@@ -29,7 +29,6 @@ Options that affect the core LocalStack system.
 | `LOCALSTACK_HOST`| `localhost.localstack.cloud:4566` (default) | This is interpolated into URLs and addresses that are returned by LocalStack. It has the form `<hostname>:<port>`. |
 | `LEGACY_DIRECTORIES` | `0` (default) | Use legacy method of managing internal filesystem layout. See [Filesystem Layout]({{< ref "filesystem" >}}). |
 | `PERSISTENCE` | `0` (default) | Enable persistence. See [Persistence Mechanism]({{< ref "persistence-mechanism" >}}) and [Filesystem Layout]({{< ref "filesystem" >}}). |
-| `PERSIST_ALL` | `true` (default) | Whether to persist all resources (including user code like Lambda functions), or only "light-weight" resources (e.g., SQS queues, or Cognito users). Can be set to `false` to reduce storage size of `DATA_DIR` folders or Cloud Pods. |
 | `MAIN_CONTAINER_NAME` | `localstack_main` (default) | Specify the main docker container name |
 | `LS_LOG` | `trace`, `trace-internal`, `debug`, `info`, `warn`, `error`, `warning`| Specify the log level. Currently overrides the `DEBUG` configuration. `trace` for detailed request/response, `trace-internal` for internal calls, too. |
 | `EXTERNAL_SERVICE_PORTS_START` | `4510` (default) | Start of the [External Service Port Range]({{< ref "external-ports" >}}) (inclusive). |