Auto merge of #47095 - leodasvacas:clarify-is-import, r=jseyfried
Auto merge of #47095 - leodasvacas:clarify-is-import, r=jseyfried

Clarify where `is_import` is used

So it's not mistaken for dead code.

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