[DOCS] Reverting CAST (FORMAT) function doc

Change-Id: I55814b933c9cfe3e2b9a3573f1ed327008ac06aa
Reviewed-on: http://gerrit.cloudera.org:8080/14165
Reviewed-by: Alex Rodoni <arodoni@cloudera.com>
Tested-by: Alex Rodoni <arodoni@cloudera.com>
1 file changed