chore(cleanup): no permissions prop and no inherited attrs

Viewer hands a lot of props to the component.
We need to pick the ones we actually need and set
`inheritAttrs` to false
so the others are not added to the dom.

Signed-off-by: Max <max@nextcloud.com>

Author: max-nextcloud

src/components/ViewerComponent.vue

@@ -36,6 +36,7 @@ export default defineComponent({
 		SourceView,
 		Editor,
 	},
+	inheritAttrs: false,
 	provide() {
 		return {
 			isEmbedded: this.isEmbedded,
@@ -66,10 +67,6 @@ export default defineComponent({
 			type: String,
 			default: null,
 		},
-		permissions: {
-			type: String,
-			default: '',
-		},
 		source: {
 			type: String,
 			default: undefined,