filemanager: Remove back/goup button

filemanager/src/views/Home.vue

@@ -38,7 +38,6 @@
     <template #header>
       <TopBar class="navbar">
         <template #left>
-          <Button icon="pi pi-chevron-left" @click="onGoUp()" text :disabled="cwd === '/'" style="margin-right: 5px;"/>
           <Button icon="pi pi-refresh" @click="onRefresh()" text :loading="busyRefresh" style="margin-right: 5px;"/>
           <PathBreadcrumbs :path="cwd" :activate-handler="onActivateBreadcrumb"/>
         </template>
@@ -264,9 +263,6 @@ export default {
     onActivateBreadcrumb(path) {
       this.cwd = sanitize(path);
     },
-    onGoUp() {
-      this.cwd = sanitize(this.cwd.split('/').slice(0, -1).join('/'));
-    },
     async onRefresh() {
       this.busyRefresh = true;
       await this.loadCwd();