svl: remove some odd and obsolete debugging code related to MI_HATS_REPARIERT

This was apparently disabled before the MI_HATS_REPARIERT check was
removed in f03a3edf2523c208948059861e0df48567834d0d, and then yesterday
something in the header inclusions changed to enable the DBG macros that
still used the removed stuff, but _only_ on Windows... now clean this up.

Change-Id: I4222db252f4a886b3497ca0c22dbec26eaa6c994