Remove unused event_suite_test
Remove unused event_suite_test

- the corresponding tests were removed but this file remained.

[#101231230]

Signed-off-by: Rob Dimsdale <4df639ba78cac7f8d741d02ef508f2611d6911dd@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse