Auto merge of #45364 - nikomatsakis:issue-44137-anon, r=michaelwoerister
Auto merge of #45364 - nikomatsakis:issue-44137-anon, r=michaelwoerister

make `erase_regions_ty` query anonymous

r? @michaelwoerister

graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust