feat: 检查WebDav备份无响应问题

Co-authored-by: traeagent <traeagent@users.noreply.github.com>

app/src/main/java/io/legado/app/ui/config/backupConfig/BackupConfigScreen.kt

@@ -624,10 +624,8 @@ fun BackupConfigScreen(
 
     AppAlertDialog(
         show = showLoadingDialog,
-        onDismiss = {},
-        onConfirm = {},
-        title = loadingText,
-        onDismissRequest = { showLoadingDialog = false }
+        onDismissRequest = { showLoadingDialog = false },
+        title = loadingText
     )
 
 }