[mob][photos] Chore

mobile/lib/models/search/hierarchical/face_filter.dart

@@ -34,10 +34,9 @@ class FaceFilter extends HierarchicalSearchFilter {
 
   @override
   IconData? icon() {
-    return Icons.face;
-    // throw UnimplementedError(
-    //   "FaceFilter does not need an icon, the face crop should be used instead",
-    // );
+    throw UnimplementedError(
+      "FaceFilter does not use an icon, the face crop should be used instead",
+    );
   }
 
   @override

mobile/lib/models/search/hierarchical/hierarchical_search_filter.dart

@@ -37,7 +37,7 @@ abstract class HierarchicalSearchFilter {
   String name();
   IconData? icon();
 
-  /// Will be [kmostRelevantFilter] if the filter is a Top-levl filter. For
+  /// Will be [kmostRelevantFilter] if the filter is a Top-level filter. For
   /// example, when searching for an album 'A' and opening it, when
   /// hierarchical search starts, the album 'A' will be the top level filter.
   int relevance();