Changes

ttcn3-epdg-test: remove "cp osmo-epdg.latest.config"

I've overlooked this in my last patch. Fix for:
  cp: cannot stat 'osmo-epdg.latest.config': No such file or directory

Fixes: 00e68245 ("ttcn3-epdg-test: remove latest code path")
Change-Id: I720e718a9daec125e94cf2e98127ec3aa48820f8