Remove unused imports

[ghc-hetmet.git] / compiler / iface / LoadIface.lhs

diff --git a/compiler/iface/LoadIface.lhs b/compiler/iface/LoadIface.lhs
index 8cd88ef..1412b00 100644 (file)
--- a/compiler/iface/LoadIface.lhs
+++ b/compiler/iface/LoadIface.lhs
@@ -28,7 +28,6 @@ import HscTypes
 
 import BasicTypes hiding (SuccessFlag(..))
 import TcRnMonad
-import Type
 
 import PrelNames
 import PrelInfo
@@ -39,9 +38,7 @@ import InstEnv
 import FamInstEnv
 import Name
 import NameEnv
-import MkId
 import Module
-import OccName
 import Maybes
 import ErrUtils
 import Finder
@@ -55,8 +52,6 @@ import FastString
 import Fingerprint
 
 import Control.Monad
-import Data.List
-import Data.Maybe
 \end{code}
 
 
@@ -127,11 +122,11 @@ loadInterfaceForName doc name
 
 -- | An 'IfM' function to load the home interface for a wired-in thing,
 -- so that we're sure that we see its instance declarations and rules
--- See Note [Loading instances]
+-- See Note [Loading instances for wired-in things] in TcIface
 loadWiredInHomeIface :: Name -> IfM lcl ()
 loadWiredInHomeIface name
   = ASSERT( isWiredInName name )
-    do loadSysInterface doc (nameModule name); return ()
+    do _ <- loadSysInterface doc (nameModule name); return ()
   where
     doc = ptext (sLit "Need home interface for wired-in thing") <+> ppr name
 
@@ -153,27 +148,6 @@ loadInterfaceWithException doc mod_name where_from
            Succeeded iface -> return iface }
 \end{code}
 
-Note [Loading instances]
-~~~~~~~~~~~~~~~~~~~~~~~~
-We need to make sure that we have at least *read* the interface files
-for any module with an instance decl or RULE that we might want.  
-
-* If the instance decl is an orphan, we have a whole separate mechanism
-  (loadOprhanModules)
-
-* If the instance decl not an orphan, then the act of looking at the
-  TyCon or Class will force in the defining module for the
-  TyCon/Class, and hence the instance decl
-
-* BUT, if the TyCon is a wired-in TyCon, we don't really need its interface;
-  but we must make sure we read its interface in case it has instances or
-  rules.  That is what LoadIface.loadWiredInHomeInterface does.  It's called
-  from TcIface.{tcImportDecl, checkWiredInTyCon, ifCHeckWiredInThing}
-
-All of this is done by the type checker. The renamer plays no role.
-(It used to, but no longer.)
-
-
 
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