PHILADELPHIA — The NFL on Wednesday pledged to halt the use of “race-norming” — which assumed Black players started out with lower cognitive function — in the $1 billion settlement of brain injury claims and review past scores for any potential race bias.The practice made it harder for Black retirees to show a deficit and qualify for an award. The standards were created in the 1990s in hopes of offering more appropriate treatment to dementia patients, but critics faulted the way they were used to determine payouts in the …