Remove comment which became obsolete in J4

Author: richard67

administrator/components/com_admin/sql/others/mysql/utf8mb4-conversion-02.sql

@@ -47,7 +47,6 @@ ALTER TABLE `#__users` MODIFY `name` varchar(400) NOT NULL DEFAULT '';
 
 --
 -- Step 2.2: Convert all tables to utf8mb4 chracter set with utf8mb4_unicode_ci collation
--- except #__finder_xxx tables, those will have utf8mb4_general_ci collation.
 -- Note: The database driver for mysql will change utf8mb4 to utf8 if utf8mb4 is not supported
 --