Fix sync error after resetting read-only group

If an item needed to be erased, it would fail with "Cannot edit item in
read-only library", because the deletion didn't skip the edit check.

chrome/content/zotero/xpcom/sync/syncLocal.js

@@ -277,7 +277,13 @@ Zotero.Sync.Data.Local = {
 				}
 			}
 			if (toDelete.length) {
-				yield objectsClass.erase(toDelete, { skipDeleteLog: true });
+				yield objectsClass.erase(
+					toDelete,
+					{
+						skipEditCheck: true,
+						skipDeleteLog: true
+					}
+				);
 			}
 			
 			// Deleted objects

test/tests/syncLocalTest.js

@@ -281,6 +281,10 @@ describe("Zotero.Sync.Data.Local", function() {
 			var deletedItemKey = deletedItem.key;
 			yield deletedItem.eraseTx();
 			
+			// Make group read-only
+			group.editable = false;
+			yield group.saveTx();
+			
 			yield Zotero.Sync.Data.Local.resetUnsyncedLibraryData(libraryID);
 			
 			assert.isNull(Zotero.SyncedSettings.get(group.libraryID, "testSetting"));