workaround rust-analyzer bug
workaround rust-analyzer bug

Summary:
Somehow this `use *` was confusing rust-analyzer to mix up `syntax::Argument` and `schema::Argument` in other places.

No need to use `*` for just 2 types anyway, so switching to the explicit `use`.

Reviewed By: alunyov

Differential Revision: D33371613

fbshipit-source-id: 05d12d973309b7110953c5cf8ca370c322fb30b5

voideanvalue/relay,josephsavona/relay,facebook/relay,xuorig/relay,wincent/relay,wincent/relay,facebook/relay,josephsavona/relay,wincent/relay,facebook/relay,wincent/relay,voideanvalue/relay,voideanvalue/relay,xuorig/relay,kassens/relay,voideanvalue/relay,wincent/relay,kassens/relay,kassens/relay,kassens/relay,kassens/relay,xuorig/relay,facebook/relay,facebook/relay,xuorig/relay,facebook/relay,kassens/relay,voideanvalue/relay,voideanvalue/relay,xuorig/relay,xuorig/relay,wincent/relay,josephsavona/relay