Remove Gnulib sources no longer needed or used. admin/merge-gnulib is typically not smart enough to do that. * configure.ac: Do not call gl_EEMALLOC, as it is no longer supplied or needed. * lib/explicit_bzero.c, lib/malloc/scratch_buffer_dupfree.c: * lib/xalloc-oversized.h, m4/eealloc.m4, m4/explicit_bzero.m4: * m4/st_dm_mode.m4, m4/year2038.m4: Remove.