Fix doc build.

docs/reference/mapping/fields.asciidoc

@@ -84,10 +84,6 @@ include::fields/routing-field.asciidoc[]
 
 include::fields/source-field.asciidoc[]
 
-include::fields/timestamp-field.asciidoc[]
-
-include::fields/ttl-field.asciidoc[]
-
 include::fields/type-field.asciidoc[]
 
 include::fields/uid-field.asciidoc[]

docs/reference/modules/indices.asciidoc

@@ -42,5 +42,3 @@ include::indices/request_cache.asciidoc[]
 
 include::indices/recovery.asciidoc[]
 
-include::indices/ttl_interval.asciidoc[]
-