vm: don't catch error just to return less detail in Execute

No reason to not just return the error directly here. Callers should be
using errors.Is and errors.As.

Author: Roasbeef

vm/vm.go

@@ -346,12 +346,6 @@ func (vm *Engine) Execute() error {
 		vm.newAsset, vm.prevAssets,
 	)
 	if err != nil {
-		if errors.Is(err, tapscript.ErrInputMismatch) {
-			return ErrInputMismatch
-		}
-		if errors.Is(err, tapscript.ErrNoInputs) {
-			return ErrNoInputs
-		}
 		return err
 	}