cf. "delete pInfo;" in ErrorHandler::HandleError_Impl
(tools/source/ref/errinf.cxx).  This reverts the remaining (non UNO related)
changes from e48d4746 "fix some memory leaks in
sc" and 5ea7e74c "fix some memory leaks in sd"
that had not already been reverted.  Whether any of these instantiations are
really leaked (i.e., never deleted again in calls to
ErrorHandler::HandleError_Impl) is unclear to me, but that would need to be
fixed in a different way.

Change-Id: I6d9e7a2f6fce6d6a4d5d390c09a5a12f593028a6