New review comment by subnut on void-packages repository

https://github.com/void-linux/void-packages/pull/37139#discussion_r873132092

Comment:
For a demo of this code
- Ensure you are on linux `5.15` or greater
- Install `ddcci-dkms-0.4.1` (from any commit before #37127 is merged)
  (During installation, you should see this message)
  ```
  ddcci-dkms-0.4.1_1: configuring ...
  DKMS module 'ddcci-0.4.1' already added, skipping.
  Building DKMS module 'ddcci-0.4.1' for kernel-5.xx.yy_z... FAILED!
  DKMS module 'ddcci-0.4.1' failed to build, please check /var/lib/dkms
  for errors in the log file.
  ```
- Run `xbps-remove ddcci-dkms`

### Without this
```
Removing DKMS module 'ddcci-0.4.1' for kernel-5.xx.yy_z... FAILED!
``` 

### With this
```
Cleaning up unbuilt DKMS module 'ddcci-0.4.1'... done.
```