Incorrect help for `tt uninstall taranool`

```
p-semyonov:tt-install p.semyonov$ tt help uninstall tarantool
Uninstall tarantool community edition

USAGE
  tt uninstall tarantool [version] [flags]
 

FLAGS
  -h, --help         help for tarantool
      --use-docker   build tarantool in Ubuntu 18.04 docker container
```

Seems like `--use-docker` is added here by mistake.