refactored more error code

frontend/src/Components/PermissionEditor.svelte

@@ -1,8 +1,8 @@
 <script>
     import { onMount }        from 'svelte';
 
-    import { api }            from '../urls.svelte.js';
-    import { t }              from '../translations.svelte.js';
+    import { api }            from '../urls.svelte';
+    import { t }              from '../translations.svelte';
 
     import Autocomplete       from './Autocomplete.svelte';
     import PermissionSelector from './PermissionSelector.svelte';
@@ -15,7 +15,6 @@
         updatePermission = (uid,perm) => console.log(`no handler for updatePermission(${uid}, ${perm})`)
     } = $props();
 
-    let error         = $state(null);
     let permissions   = $state(null);
     let sortedMembers = $derived.by(() => Object.values(members).sort((a, b) => a.user.name.localeCompare(b.user.name)));
 
@@ -36,9 +35,6 @@
     onMount(loadPermissions);
 </script>
 
-{#if error}
-<span class="error">{error}</span>
-{/if}
 <table>
     <tbody>
     {#each sortedMembers as member,i}