debian: remove unused source package files

We are only building a binary package
1 job for initcmd in 18 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Package
failed package #1622

00:00:18

 
Name Stage Failure
failed
package Package

Skipping Git submodules setup
Authenticating with credentials from /Users/andy/.docker/config.json
Authenticating with credentials from /Users/andy/.docker/config.json
Authenticating with credentials from /Users/andy/.docker/config.json
$ cp dist/control dist/control.skel
cp: cannot stat 'dist/control': No such file or directory
Authenticating with credentials from /Users/andy/.docker/config.json
ERROR: Job failed: exit code 1