Remove very verbose debug statements

src/Nix/Exec.hs

@@ -298,13 +298,11 @@ callFunc fun arg = demand fun $ \fun' -> do
     "Function call stack exhausted"
   case fun' of
     NVClosure params f -> do
-      traceM $ "callFunc:NVFunction taking " ++ show params
       f arg
     NVBuiltin name f -> do
       span <- currentPos
       withFrame Info (Calling @m @t name span) (f arg)
     s@(NVSet m _) | Just f <- M.lookup "__functor" m -> do
-      traceM "callFunc:__functor"
       demand f $ (`callFunc` s) >=> (`callFunc` arg)
     x -> throwError $ ErrorCall $ "Attempt to call non-function: " ++ show x
 
@@ -316,7 +314,6 @@ execUnaryOp
   -> NValue t f m
   -> m (NValue t f m)
 execUnaryOp scope span op arg = do
-  traceM "NUnary"
   case arg of
     NVConstant c -> case (op, c) of
       (NNeg, NInt i  ) -> unaryOp $ NInt (-i)