Hadrian first-level build doesn't do -Werror
The first-level hadrian CI build doesn't do -Werror, or at least doesn't warn on unused imports as much as the make-based build. Example https://gitlab.haskell.org/ghc/ghc/pipelines/8597
The first-level hadrian CI build doesn't do -Werror, or at least doesn't warn on unused imports as much as the make-based build. Example https://gitlab.haskell.org/ghc/ghc/pipelines/8597