Deprecate ineffective MysqlIncreaseFileLimit

This parameter enables the systemd drop-in for mariadb.service but
the service has never used since all services were containerized.

Change-Id: I88e5f7c13861729c464a8ba88b5ca2c090597d93

deployment/database/mysql-base.yaml

@@ -84,6 +84,7 @@ parameter_groups:
    OpenStack mailing list.
   parameters:
   - MysqlIPv6
+  - MysqlIncreaseFileLimit
 
 conditions:
   is_ipv6:
@@ -137,8 +138,6 @@ outputs:
               "%{hiera('fqdn_$NETWORK')}"
             params:
               $NETWORK: {get_param: [ServiceNetMap, MysqlNetwork]}
-        tripleo::profile::base::database::mysql::generate_dropin_file_limit:
-          {get_param: MysqlIncreaseFileLimit}
         tripleo::profile::base::database::mysql::certificate_specs:
           if:
             - {get_param: EnableInternalTLS}

releasenotes/notes/deprecate-MysqlIncreaseFileLimit-20548c5f7234d14c.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    The ``MysqlIncreaseFileLimit`` parameter has been deprecated and has no
+    effect now.