refactor(angular): remove redundant version() call in dataModel computed property (a2ui-project#1475)

Removes the redundant this.messageProcessorV08.version() call in the dataModel computed property of AgentStubV08Service.

Author: josemontespg

renderers/angular/a2ui_explorer/src/app/agent-stub-v08.service.ts

@@ -45,7 +45,6 @@ export class AgentStubV08Service extends AgentStubService {
   private actionSub?: {unsubscribe: () => void};
 
   override dataModel = computed(() => {
-    this.messageProcessorV08.version();
     const surfaceId = this.surfaceId();
     if (!surfaceId) return {};
     const surfaces = this.messageProcessorV08.getSurfaces();