Revert "Add classLoader argument."

This reverts commit 66d05774cfd7da17db0a435347f93dd6100f12a5.

Change-Id: I721884308dbb5e22a8636af9b68a5100d2cd3dad
Reviewed-on: https://pirx.atteo.com/gerrit/532
Tested-by: Mr. Jenkins
Reviewed-by: Sławek Piotrowski <sentinel@atteo.com>