Revert "jruby: add temporary traces for profiling"

This reverts commit a1c91a935578ac5650a2a36722cf67dec7fe86dc.

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>

Conflicts:
	osgi-bundles/bundles/jruby/src/main/java/org/killbill/billing/osgi/bundles/jruby/JRubyPlugin.java