There's a merged pull request on the void-packages repository

linux-firmware-dvb: remove now unnecessary license files
https://github.com/void-linux/void-packages/pull/40724

Description:
#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64)

With the latest revision 5 I've removed firmware but forgot to remove the license files.

This PR does remove the no longer necessary files.