reduce unsafe

codegen/getopenapiof/main.go

@@ -10,8 +10,6 @@ const head = `// Code generated by codegen/getopenapiof. DO NOT EDIT.
 package nano
 
 import (
-	"unsafe"
-
 	"github.com/pkg/errors"
 )
 `
@@ -26,7 +24,7 @@ func (bot *Bot) getOpenAPIof[T any](ep string) (*[T any], error) {
 	if err != nil {
 		err = errors.Wrap(err, getCallerFuncName())
 	}
-	return (*[T any])(unsafe.Add(unsafe.Pointer(resp), unsafe.Sizeof(CodeMessageBase{}))), err
+	return &resp.[T any], err
 }
 `