Improve needless_borrowed_ref lint: remove the hand rolled span part.
Improve needless_borrowed_ref lint: remove the hand rolled span part.

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