Remove unused contentLoading code

aleksis/core/assets/components/LegacyBaseTemplate.vue

@@ -73,19 +73,12 @@ export default {
       this.$root.$setPageTitle(title);
     },
   },
-  watch: {
-    $route() {
-      // Show loading animation once route changes
-      this.$root.contentLoading = true;
-    },
-  },
   mounted() {
     // Subscribe to message channel to receive height from iframe
     window.addEventListener("message", this.receiveMessage);
   },
   beforeDestroy() {
     window.removeEventListener("message", this.receiveMessage);
-    this.$root.contentLoading = false;
   },
   name: "LegacyBaseTemplate",
 };