Fix build

Signed-off-by: Andrew Stein <steinlink@gmail.com>

Author: texodus

packages/viewer-webgl/src/ts/plugin/plugin.ts

@@ -387,21 +387,21 @@ export class HTMLPerspectiveViewerWebGLPluginElement extends HTMLElement {
         await this.resize();
     }
 
-    async save(): Promise<any> {
+    save() {
         const state: any = {};
         if (this._zoomController) {
             state.zoom = this._zoomController.serialize();
         }
         return state;
     }
 
-    async restore(config: any): Promise<void> {
+    restore(config: any) {
         if (config?.zoom && this._zoomController) {
             this._zoomController.restore(config.zoom);
         }
     }
 
-    async delete(): Promise<void> {
+    delete() {
         this._generation++;
         // Destroy chart first — it may need the GL context for cleanup.
         if (this._chartImpl) {

rust/perspective-viewer/src/ts/plugin.ts

@@ -209,7 +209,7 @@ export interface IPerspectiveViewerPlugin {
     /**
      * Free any resources acquired by this plugin and prepare to be deleted.
      */
-    delete(): Promise<void>;
+    delete(): void;
 
     /**
      * Whether this plugin supports the streaming render protocol.