...this was a transitional hack to get XML-format service.rdbs in.  Now that
registry-based bootstrap_InitialComponentContext is gone, XML-format .rdbs need
only be handled in cppuhelper/source/defaultbootstrap.cxx (so the
textualservices stuff once duplicated to there now effectively moved there).

Change-Id: Ifb93558768095c1b462fe4057ebf8724968cca77