remove two unreachable LHS conversion errors

src/Convert/Logic.hs

@@ -141,12 +141,7 @@ traverseModuleItem ports scopes =
                         items =
                             [ MIPackageItem $ Decl decl
                             , always_comb $ Asgn AsgnOpEq Nothing lhs tmpExpr]
-                        lhs = case exprToLHS expr of
+                        Just lhs = exprToLHS expr
-                            Just l -> l
-                            Nothing ->
-                                error $ "bad non-lhs, non-net expr "
-                                    ++ show expr ++ " connected to output port "
-                                    ++ portName ++ " of " ++ instanceName
                 maybeModulePorts = Map.lookup moduleName ports
         fixModuleItem other = other
 

src/Convert/MultiplePacked.hs

@@ -144,10 +144,8 @@ traverseLHSM = traverseNestedLHSsM traverseLHSSingleM
         traverseLHSSingleM lhs = do
             let expr = lhsToExpr lhs
             expr' <- convertExprM expr
-            case exprToLHS expr' of
+            let Just lhs' = exprToLHS expr'
-                Just lhs' -> return lhs'
+            return lhs'
-                Nothing -> error $ "multi-packed conversion created non-LHS from "
-                    ++ (show expr) ++ " to " ++ (show expr')
 
 convertExprM :: Expr -> Scoper TypeInfo Expr
 convertExprM = embedScopes convertExpr