Move checkPredefError from GF.Compile.Compute.ConcreteLazy to GF.Grammar.Macros

Also simplified its type.

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

@@ -519,12 +519,6 @@ getArgType t = case t of
   V ty _ -> return ty
   T (TComp ty) _ -> return ty
   _ -> fail (render (text "cannot get argument type of table" $$ nest 2 (ppTerm Unqualified 0 t)))
-
-checkPredefError :: SourceGrammar -> Term -> Err Term
-checkPredefError sgr t =
-    case t of
-      Error s -> fail ("Error: "++s)
-      _ -> return t
   
 {-
 -- Old