Remove timeouts for C2 tests
Summary: When run on very heavily loaded machines, some of these tests are timing out. It's not an issue with the test, it's an issue with the environment. I've removed the timeout so we at least keep unit test coverage.
Test Plan: N/A: Fix breakages
Reviewed By: ngimel
Differential Revision: D28492334
fbshipit-source-id: aed3ee371763161aab2d356f5623c7df053fda6f
