nixos/tests/ec2: drop

This test has been marked as broken for a long time,
it seems that no one is really owning it and this is a waste of our resources.

Feel free to revert and add yourself as a maintainer
if you care about this.

nixos/tests/all-tests.nix

@@ -255,8 +255,6 @@ in {
   drbd = handleTest ./drbd.nix {};
   earlyoom = handleTestOn ["x86_64-linux"] ./earlyoom.nix {};
   early-mount-options = handleTest ./early-mount-options.nix {};
-  ec2-config = (handleTestOn ["x86_64-linux"] ./ec2.nix {}).boot-ec2-config or {};
-  ec2-nixops = (handleTestOn ["x86_64-linux"] ./ec2.nix {}).boot-ec2-nixops or {};
   ecryptfs = handleTest ./ecryptfs.nix {};
   fscrypt = handleTest ./fscrypt.nix {};
   fastnetmon-advanced = runTest ./fastnetmon-advanced.nix;