Remove unused internaldto import from parameter_router.go

Author: claude

internal/stackql/router/parameter_router.go

@@ -11,7 +11,6 @@ import (
 	"github.com/stackql/stackql/internal/stackql/astvisit"
 	"github.com/stackql/stackql/internal/stackql/dataflow"
 	"github.com/stackql/stackql/internal/stackql/handler"
-	"github.com/stackql/stackql/internal/stackql/internal_data_transfer/internaldto"
 	"github.com/stackql/stackql/internal/stackql/parserutil"
 	"github.com/stackql/stackql/internal/stackql/router/obtain_context"
 	"github.com/stackql/stackql/internal/stackql/tablemetadata"