Syntax:
UNINSTALL PLUGIN plugin_name

This statement removes an installed server plugin. UNINSTALL PLUGIN is
the complement of INSTALL PLUGIN. It requires the DELETE privilege for
the mysql.plugin system table because it removes the row from that
table that registers the plugin.

plugin_name must be the name of some plugin that is listed in the
mysql.plugin table. The server executes the plugin's deinitialization
function and removes the row for the plugin from the mysql.plugin
system table, so that subsequent server restarts do not load and
initialize the plugin. UNINSTALL PLUGIN does not remove the plugin's
shared library file.

URL: https://dev.mysql.com/doc/refman/8.0/en/uninstall-plugin.html

