Revert passivate tracking to fix #944

[SimunKaracic]

The problem here is that it's very hard to replicate the error locally.
Since it's just a simple revert, it'll go out in the next release, but I'd sleep better at night if someone (who can reproduce this not in prod) were to try this out on an app that's currently showing the bug

If you're up for it, checkout this branch, start sbt and do the following:

set version in ThisBuild := "944-fix"
+publishLocal

or if you're using maven

set version in ThisBuild := "944-fix"
+publishM2

and add the kamon version 944-fix to you app :)