fix user chat input duplicates in dashboard

frontend/src/components/dashboard/Chat.vue

@@ -54,7 +54,6 @@ export default class Chat extends Vue {
       this.message = ChatMessageVmV1.fromJson({'role': 'user', 'name': this.user, 'content': this.text});
       this.text = '';
       await this.apiStore.aiApi.chatText(this.aiInstance.configuration.id, this.message);
-      this.aiInstance.messages.push(this.message);
     } catch (e) {
       toast.error('Error while chatting: ' + JSON.stringify(e));
     } finally {