fix table formatting

docs/en/observability/apm/manage-storage/ilm-how-to.asciidoc

@@ -28,7 +28,7 @@ Each APM data stream has its own default lifecycle policy including a delete def
 The table below describes the delete definition for each APM data stream.
 The delete phase permanently removes the index after a time threshold is met.
 
-[cols="1,1,1,1",options="header"]
+[cols="1,1,1",options="header"]
 |===
 |Data stream
 |Delete after