Remove unused $moment and $emitter from globalProperties

These were set for Options API (this.$moment, this.$emitter) but all
components now use <script setup> with direct imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main.ts

@@ -15,8 +15,6 @@ import { createApp, markRaw } from "vue";
 import App from "./App.vue";
 import router from "./router";
 import pinia from '@/stores/main';
-import moment from 'moment';
-import emitter from '@/utils/emitter';
 import ToastPlugin from 'vue-toast-notification';
 import cytoscape from 'cytoscape';
 import dagre from 'cytoscape-dagre';
@@ -63,12 +61,6 @@ pinia.use(({ store }) => {
   store.$router = markRaw(router);
 });
 
-// can use `this.$moment` in Vue.js
-app.config.globalProperties.$moment = moment;
-app.config.globalProperties.$emitter = emitter;
-app.config.globalProperties.$cytoscape = cytoscape;
-
-
 // Cytoscape.js's style
 cytoscape.use( dagre );
 cytoscape.use( popper((ref) => ref) );