Make db/seeds work again after f56aa55843a9962cdbc7a71299c36463a86f4250
Make db/seeds work again after f56aa55843a9962cdbc7a71299c36463a86f4250

Bootstrapping a new clone broke because there were still a couple
references to this column which now doesn't exist. :fire:

Error was:

```
ActiveModel::UnknownAttributeError: unknown attribute 'pointer_id' for Plant.
/Users/airhorns/Code/Farmbot-Web-App/db/seeds.rb:58:in `block in <top (required)>'
/Users/airhorns/Code/Farmbot-Web-App/db/seeds.rb:57:in `times'
/Users/airhorns/Code/Farmbot-Web-App/db/seeds.rb:57:in `<top (required)>'
/Users/airhorns/.rbenv/versions/2.5.1/bin/bundle:23:in `load'
/Users/airhorns/.rbenv/versions/2.5.1/bin/bundle:23:in `<main>'
```

FarmBot/Farmbot-Web-API,RickCarlino/farmbot-web-app,gabrielburnworth/Farmbot-Web-App,FarmBot/Farmbot-Web-API,FarmBot/Farmbot-Web-API,gabrielburnworth/Farmbot-Web-App,RickCarlino/farmbot-web-app,gabrielburnworth/Farmbot-Web-App,gabrielburnworth/Farmbot-Web-App,FarmBot/farmbot-web-app,FarmBot/Farmbot-Web-API,RickCarlino/farmbot-web-app,RickCarlino/farmbot-web-app,RickCarlino/farmbot-web-app,FarmBot/Farmbot-Web-API,FarmBot/farmbot-web-app,gabrielburnworth/Farmbot-Web-App,FarmBot/farmbot-web-app