Redundant imports.

Cabal/Distribution/Simple/GHC.hs

@@ -116,7 +116,7 @@ import Distribution.Simple.Compiler
 import Distribution.Version
          ( Version(..), anyVersion, orLaterVersion )
 import Distribution.System
-         ( OS(..), buildOS, Arch(..), buildArch )
+         ( OS(..), buildOS )
 import Distribution.Verbosity
 import Distribution.Text
          ( display, simpleParse )

Cabal/Distribution/Simple/Haddock.hs

@@ -78,8 +78,8 @@ import Distribution.Simple.InstallDirs (InstallDirs(..), PathTemplateEnv, PathTe
                                         substPathTemplate,
                                         initialPathTemplateEnv)
 import Distribution.Simple.LocalBuildInfo
-         ( LocalBuildInfo(..), externalPackageDeps
-         , Component(..), ComponentLocalBuildInfo(..), withComponentsLBI )
+         ( LocalBuildInfo(..), Component(..), ComponentLocalBuildInfo(..)
+         , withComponentsLBI )
 import Distribution.Simple.BuildPaths ( haddockName,
                                         hscolourPref, autogenModulesDir,
                                         )