DROP PLUGIN plugin_name TYPE 'plugin_type'

Markes the specified plugin for unloading. The unloading is not immediate, because the concurrent queries might be using it. However, after a DROP new queries will not be able to use it. Then, once all the currently executing queries using it are completed, the plugin will be unloaded. Once all the plugins from the given library are unloaded, the library is also automatically unloaded.

mysql> DROP PLUGIN myranker TYPE 'ranker';
Query OK, 0 rows affected (0.00 sec)