test: cpu profiling now works on v0.10

strongloop/strongops@2ba8228b84cfbebd44e103ccb78da676a2c7b40a added cpu
profiling support for v0.10 in strong-agent v1.0.3, so remove the code
dealing with it not being supported on some node versions.

Closes https://github.com/strongloop-internal/scrum-nodeops/issues/155