A list of the currently loaded plugins can be retrieved with the
sudo bin/elasticsearch-plugin list
Alternatively, use the node-info API to find out which plugins are installed on each node in the cluster
Plugins can be removed manually, by deleting the appropriate directory under
plugins/, or using the public script:
sudo bin/elasticsearch-plugin remove [pluginname]
After a Java plugin has been removed, you will need to restart the node to complete the removal process.