Goodbye, GraphQL (#24827)

```release-note
NONE
```

server/public/pluginapi/experimental/oauther/mock_oauther/mock_oauther.go

@@ -5,9 +5,10 @@
 package mock_oauther
 
 import (
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	oauth2 "golang.org/x/oauth2"
-	reflect "reflect"
 )
 
 // MockOAuther is a mock of OAuther interface