We can also drop the workaround included in the bump to 3.76.1, as upstream reverted that behavorial change.
* buildkite-agent: 3.59.0 -> 3.76.1 * nixos/buildkite-agent: put each agent in its own private /tmp Workaround for https://github.com/buildkite/agent/issues/2916, but probably still a good idea.
