Fix query evaluation timing in rego package
Fix query evaluation timing in rego package

Update the rego package to NOT start/stop the query evaluation latency
timer. The topdown package does this already--and the duplicate call was
causing higher than expected latency to be reported.

tsandall/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa,tsandall/opa,tsandall/opa,tsandall/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa