Bug: Modify the format error to meet the format automation

[plutoyty]

What happened?

go.mod:145:1: replacement are not allowed: github.com/Shopify/sarama (gomoddirectives)
replace github.com/Shopify/sarama => github.com/Shopify/sarama v1.29.0
^
internal/push/offlinepush/offlinepush_interface.go:21:6: exported type `OfflinePusher` should have comment or be unexported (golint)
type OfflinePusher interface {
     ^
internal/push/offlinepush/offlinepush_interface.go:25:6: exported type `Opts` should have comment or be unexported (golint)
type Opts struct {
     ^
internal/push/offlinepush/offlinepush_interface.go:32:6: exported type `Signal` should have comment or be unexported (golint)
type Signal struct {

What did you expect to happen?

format cannot pass the automated process

How can we reproduce it (as minimally and precisely as possible)?

Make changes according to the error message

Anything else we need to know?

No response

version

```console $ {name} version # paste output here ```

Cloud provider

OS version

```console # On Linux: $ cat /etc/os-release # paste output here $ uname -a # paste output here # On Windows: C:\> wmic os get Caption, Version, BuildNumber, OSArchitecture # paste output here ```

Install tools