PHILADELPHIA — The court-appointed lead lawyer for thousands of retired players suing the NFL pledged Monday to try to remove race as a factor in dementia testing, but lawyers for Black players demanded he release the data on payouts by race in the $1 billion concussion settlement.They argue that Black men are being denied awards that average more than $500,000 because of testing methods that assume Black people have lower cognitive function than white people.That makes it harder to show they’ve suffered neurological …