Rollup merge of #32727 - matklad:fix-comment, r=alexcrichton
Rollup merge of #32727 - matklad:fix-comment, r=alexcrichton

minor: update old comments

No more lifetimes in function types after https://github.com/rust-lang/rust/commit/f945190e6352a1bc965a117569532643319b400f

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