optimize(projects): optimize code

Author: honghuangdc

src/layouts/modules/global-menu/modules/horizontal-mix-menu.vue

@@ -56,9 +56,7 @@ function handleSelectMixMenu(menu: App.Global.Menu) {
       :theme-color="themeStore.themeColor"
       @select="handleSelectMixMenu"
       @toggle-sider-collapse="appStore.toggleSiderCollapse"
-    >
-      <slot></slot>
-    </FirstLevelMenu>
+    />
   </Teleport>
 </template>