The retired baseball great was taken into custody six weeks ago and charged with cocaine possession.
A bystander's video of the fight went viral after it was posted on YouTube.
The $2.4B terminal contains an exhibition titled “Harvey Milk: Messenger of Hope,” which honors the LGBTQ-rights icon.
Karen Harrison had told officials her son fell from her friend's arms, but police say video shows the mother dropping her child during a parking lot brawl.
The resignation came after Darrell Johnson said he would not leave his daughter alone with an accused pedophile, which he says was taken out of context.