import action for out of scope names, start introducing error types

src/Lib/Types.newt

@@ -570,13 +570,6 @@ debugM x = logM 2 x
 instance Show Context where
   show ctx = "Context \{show $ map fst $ ctx.types}"
 
-errorMsg : Error -> String
-errorMsg (E x str) = str
-errorMsg (Postpone x k str) = str
-
-instance HasFC Error where
-  getFC (E x str) = x
-  getFC (Postpone x k str) = x
 
 error : ∀ a. FC -> String -> M a
 error fc msg = throwError $ E fc msg