Remove not used show plans

Signed-off-by: Xuanwo <github@xuanwo.io>

Author: Xuanwo

src/query/legacy-planners/src/lib.rs

@@ -55,18 +55,7 @@ mod plan_role_grant;
 mod plan_role_revoke;
 mod plan_select;
 mod plan_setting;
-mod plan_show;
-mod plan_show_databases;
-mod plan_show_engines;
-mod plan_show_functions;
 mod plan_show_grants;
-mod plan_show_metrics;
-mod plan_show_processlist;
-mod plan_show_roles;
-mod plan_show_settings;
-mod plan_show_tables;
-mod plan_show_tables_status;
-mod plan_show_users;
 mod plan_sink;
 mod plan_sort;
 mod plan_subqueries_set;
@@ -178,19 +167,7 @@ pub use plan_role_revoke::RevokeRolePlan;
 pub use plan_select::SelectPlan;
 pub use plan_setting::SettingPlan;
 pub use plan_setting::VarValue;
-pub use plan_show::PlanShowKind;
-pub use plan_show::ShowPlan;
-pub use plan_show_databases::ShowDatabasesPlan;
-pub use plan_show_engines::ShowEnginesPlan;
-pub use plan_show_functions::ShowFunctionsPlan;
 pub use plan_show_grants::ShowGrantsPlan;
-pub use plan_show_metrics::ShowMetricsPlan;
-pub use plan_show_processlist::ShowProcessListsPlan;
-pub use plan_show_roles::ShowRolesPlan;
-pub use plan_show_settings::ShowSettingsPlan;
-pub use plan_show_tables::ShowTablesPlan;
-pub use plan_show_tables_status::ShowTablesStatusPlan;
-pub use plan_show_users::ShowUsersPlan;
 pub use plan_sink::SinkPlan;
 pub use plan_sink::SINK_SCHEMA;
 pub use plan_sort::SortPlan;