Remove special describe-table-fks for redshift (#39011)

modules/drivers/redshift/src/metabase/driver/redshift.clj

@@ -49,38 +49,6 @@
   [& args]
   (apply (get-method driver/describe-table :sql-jdbc) args))
 
-;; The Postgres JDBC .getImportedKeys method doesn't work for Redshift, and we're not allowed to access
-;; information_schema.constraint_column_usage, so we'll have to use this custom query instead
-;;
-;; See also: [Related Postgres JDBC driver issue on GitHub](https://github.com/pgjdbc/pgjdbc/issues/79)
-;;           [How to access the equivalent of information_schema.constraint_column_usage in Redshift](https://forums.aws.amazon.com/thread.jspa?threadID=133514)
-(def ^:private fk-query
-  "SELECT source_column.attname AS \"fk-column-name\",
-          dest_table.relname    AS \"dest-table-name\",
-          dest_table_ns.nspname AS \"dest-table-schema\",
-          dest_column.attname   AS \"dest-column-name\"
-   FROM pg_constraint c
-          JOIN pg_namespace n             ON c.connamespace          = n.oid
-          JOIN pg_class source_table      ON c.conrelid              = source_table.oid
-          JOIN pg_attribute source_column ON c.conrelid              = source_column.attrelid
-          JOIN pg_class dest_table        ON c.confrelid             = dest_table.oid
-          JOIN pg_namespace dest_table_ns ON dest_table.relnamespace = dest_table_ns.oid
-          JOIN pg_attribute dest_column   ON c.confrelid             = dest_column.attrelid
-   WHERE c.contype                 = 'f'::char
-          AND source_table.relname = ?
-          AND n.nspname            = ?
-          AND source_column.attnum = ANY(c.conkey)
-          AND dest_column.attnum   = ANY(c.confkey)")
-
-(defmethod driver/describe-table-fks :redshift
-  [_ database table]
-  (set (for [fk (jdbc/query (sql-jdbc.conn/db->pooled-connection-spec database)
-                            [fk-query (:name table) (:schema table)])]
-         {:fk-column-name   (:fk-column-name fk)
-          :dest-table       {:name   (:dest-table-name fk)
-                             :schema (:dest-table-schema fk)}
-          :dest-column-name (:dest-column-name fk)})))
-
 (defmethod driver/db-start-of-week :redshift
   [_]
   :sunday)