removed needless aria-label (#31652)

Signed-off-by: Agnieszka Gancarczyk <agancarc@redhat.com>

js/apps/admin-ui/src/components/table-toolbar/KeycloakDataTable.tsx

@@ -150,7 +150,6 @@ function DataTable<T>({
           {columns.map((column) => (
             <Th
               key={column.displayKey}
-              aria-label={t(ariaLabelKey)}
               className={column.transforms?.[0]().className}
             >
               {t(column.displayKey || column.name)}