[CSRSRV]

[CSRSRV]
- Remove unused functions CallHardError and CsrHandleHardError (in fact calling the hard error callback is already done in the listening thread).
- Add an annotation and correct a typographical error; remove old comments.
- Remove the now unneeded csrplugin.h header (a relic of the old callback system of the old csrss/csrsrv).

svn path=/branches/ros-csrss/; revision=57741