Add upstream

wp-content/plugins/jetpack/uninstall.php

@@ -0,0 +1,38 @@
+<?php
+
+use Automattic\Jetpack\Sync\Sender;
+
+if (
+	!defined( 'WP_UNINSTALL_PLUGIN' )
+	||
+	!WP_UNINSTALL_PLUGIN
+	||
+	dirname( WP_UNINSTALL_PLUGIN ) != dirname( plugin_basename( __FILE__ ) )
+) {
+	status_header( 404 );
+	exit;
+}
+
+if ( ! defined( 'JETPACK__PLUGIN_DIR' ) ) {
+	define( 'JETPACK__PLUGIN_DIR', plugin_dir_path( __FILE__ )  );
+}
+
+require JETPACK__PLUGIN_DIR . 'vendor/autoload_packages.php';
+
+Jetpack_Options::delete_all_known_options();
+
+// Delete all legacy options
+delete_option( 'jetpack_was_activated'  );
+delete_option( 'jetpack_auto_installed' );
+delete_option( 'jetpack_register'       );
+delete_transient( 'jetpack_register'    );
+
+// Delete sync options
+//
+// Do not initialize any listeners.
+// Since all the files will be deleted.
+// No need to try to sync anything.
+add_filter( 'jetpack_sync_modules', '__return_empty_array', 100 );
+
+// Jetpack Sync
+Sender::get_instance()->uninstall();