remove old, unused eclass tests

These tests appear to be unused.
As advised by vapier@, I am removing these tests,
so that we don't have to update them when we update our classes from
upstream.

BUG=b:332743122
TEST=CQ

Change-Id: Ia14366849cf52378556afe14cec6a57bc8c6023a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/5421489
Tested-by: Saswat Padhi <spadhi@google.com>
Commit-Queue: Saswat Padhi <spadhi@google.com>
Auto-Submit: Saswat Padhi <spadhi@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
18 files changed