Hilary Swank -- Cleaning House After Chechnya Blunder

Hilary Swank got serious backlash after appearing at the birthday party for a murdering warlord ... so she's reportedly firing the people who put her in that position.

Swank attended a concert in Chechnya for president Ramzan Kadyrov on October 5 and immediately took heat from human rights groups ... probably because Kadyrov has a section on his Wikipedia page devoted entirely to his alleged human rights abuses.

Swank apologized, but according to The Independent ... it's her manager, Jason Weinberg, who is sorry now. The paper says he was let go last week and two of her agents at CAA, Amie Yavor and Josh Lieberman, are next to go.

Not among those getting the boot -- her agent/boyfriend, John Campisi.