modify sql functions

sql/get_urls_and_paths.sql

@@ -1,19 +0,0 @@
-CREATE OR REPLACE FUNCTION get_urls_and_paths(website_name text)
-RETURNS TABLE (
-	out_url text,
-	out_website_name text
-) AS
-$$
-BEGIN
-	RETURN QUERY SELECT aw.url, aw.folder_path
-				  FROM artist_website aw
-				  INNER JOIN website w ON aw.website_id = w.id
-                  WHERE  w.name ILIKE website_name;
-
-    IF NOT FOUND THEN
-        RAISE EXCEPTION 'No urls and paths found for website: %', website_name;
-    END IF;
-
-    RETURN;
-END;
-$$ LANGUAGE plpgsql;