deps: remove unused rustc_attr crate AP crate
deps: remove unused rustc_attr crate AP crate

SingingTree/rustfmt,aidancully/rust,SingingTree/rustfmt,aidancully/rust,rust-lang/rustfmt,rust-lang/rustfmt,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust