FSAL_HPSS: remove source for copyright reasons. In order to ease a revert commit in CEA's private repo, files were left but emptied.

Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>

Conflicts:
	src/FSAL/FSAL_HPSS/export.c
	src/FSAL/FSAL_HPSS/fsal_convert.c
	src/FSAL/FSAL_HPSS/fsal_internal.h
	src/FSAL/FSAL_HPSS/handle.c
	src/FSAL/FSAL_HPSS/main.c