/**
  * Called on plugin uninstallation.
  */
 public function uninstall()
 {
     // remove private key table from DB
     Crypto::deletePrivateKeyTable();
     // Notes: - No DB problems exception catching done here (to prevent uninstallation on
     //          DB issues), as that is already done by the plugin manager for all plugins.
     //        - The public key stored in plugin settings and in the JavaScript file is
     //          left to Piwik to be removed on plugin files and settings removal.
 }