Updated document as per code change. (#22878)

Updated document as per this change : https://github.com/elastic/elasticsearch/pull/15235

docs/reference/modules/indices/recovery.asciidoc

@@ -1,22 +1,10 @@
 [[recovery]]
 === Indices Recovery
 
-The following _expert_ settings can be set to manage the recovery policy.
-
-`indices.recovery.file_chunk_size`::
-    Defaults to `512kb`.
-
-`indices.recovery.translog_ops`::
-    Defaults to `1000`.
-
-`indices.recovery.translog_size`::
-    Defaults to `512kb`.
-
-`indices.recovery.compress`::
-    Defaults to `true`.
+The following _expert_ setting can be set to manage the recovery policy.
 
 `indices.recovery.max_bytes_per_sec`::
     Defaults to `40mb`.
 
-These settings can be dynamically updated on a live cluster with the
+This setting can be dynamically updated on a live cluster with the
 <<cluster-update-settings,cluster-update-settings>> API: