Fix PuppetServer warning (#85)

At each catalog compilation, the PuppetServer emits this warning:

```
[...]/
2021-02-13T18:32:03.670+01:00 WARN  [qtp2049270356-5346] [puppetserver] Puppet /etc/puppetlabs/code/environments/production/modules/augeas/data/common.yaml: file does not contain a valid yaml hash
2021-02-13T19:02:06.662+01:00 WARN  [qtp2049270356-5478] [puppetserver] Puppet /etc/puppetlabs/code/environments/production/modules/augeas/data/common.yaml: file does not contain a valid yaml hash
2021-02-13T19:32:07.069+01:00 WARN  [qtp2049270356-5821] [puppetserver] Puppet /etc/puppetlabs/code/environments/production/modules/augeas/data/common.yaml: file does not contain a valid yaml hash
```

Remove empty file to avoid it.