Fix an old name shadowing bug in concrete syntax by removing the refresh pass

The refresh pass does not correctly keep track of the scope of local variables
and can convert things like \x->(\x->x) x into \x1->(\x2->x2) x2. Fortunately,
it appears that the refresh pass is not needed anymore, so it has been removed.

src/compiler/GF/Compile/Compute/ConcreteLazy.hs

@@ -24,7 +24,7 @@ import GF.Grammar.Printer
 import GF.Grammar.Predef
 import GF.Grammar.Macros
 import GF.Grammar.Lookup
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Grammar.PatternMatch
 import GF.Grammar.Lockfield (isLockLabel,unlockRecord) ----
 

src/compiler/GF/Compile/Compute/ConcreteStrict.hs

@@ -18,14 +18,14 @@ import GF.Data.Operations
 import GF.Grammar.Grammar
 import GF.Infra.Ident
 import GF.Infra.Option
-import GF.Infra.Modules
+--import GF.Infra.Modules
 import GF.Data.Str
 import GF.Grammar.ShowTerm
 import GF.Grammar.Printer
 import GF.Grammar.Predef
 import GF.Grammar.Macros
 import GF.Grammar.Lookup
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Grammar.PatternMatch
 import GF.Grammar.Lockfield (isLockLabel,unlockRecord) ----
 

src/compiler/GF/Compile/Optimize.hs

@@ -21,7 +21,7 @@ import GF.Grammar.Printer
 import GF.Grammar.Macros
 import GF.Grammar.Lookup
 import GF.Grammar.Predef
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Compile.Compute.Concrete
 import GF.Compile.CheckGrammar
 import GF.Compile.Update

src/compiler/GF/Compile/Refresh.hs

@@ -12,10 +12,10 @@
 -- (Description of the module)
 -----------------------------------------------------------------------------
 
-module GF.Compile.Refresh (refreshTerm, refreshTermN,
-		refreshModule
+module GF.Compile.Refresh ({-refreshTermN, refreshTerm,
+		refreshModule-}
 	       ) where
-
+{-
 import GF.Data.Operations
 import GF.Grammar.Grammar
 import GF.Infra.Ident
@@ -143,3 +143,4 @@ inBlockSTM mo = do
   return v
 
 
+-}

src/compiler/GF/Compile/TypeCheck/Abstract.hs

@@ -25,7 +25,7 @@ import GF.Infra.CheckM
 import GF.Grammar
 import GF.Grammar.Lookup
 import GF.Grammar.Unify
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Compile.Compute.Abstract
 import GF.Compile.TypeCheck.TC