errno-iter, strerrorname_np: Remove support for IRIX. * lib/errno-iter.c (errno_iterate): Remove cases for EBADFILT, EBADRSPEC, EBADTSPEC, EBDHDL, EBUFSIZE, ECANTEXTENT, ECELLDOWN, ECKPT, ECLOCKCPU, ECONTROLLER, EDELAY, EDESTROYED, EDIRCORRUPTED, EDISJOINT, EEMPTY, EENDOFMINOR, EENQUEUED, EFSCORRUPTED, EGROUPLOOP, EINIT, EINVALMODE, EINVALSTATE, EINVALTIME, EIORESID, EJOINED, ELOGINLIM, EMEMRETRY, EMIGRATED, EMIGRATING, EMUSTRUN, ENFSREMOTE, ENOATTACH, ENOBWD, ENOEXIST, ENOINTRGROUP, ENOLIMFILE, ENOLOGIN, ENOMESSAGE, ENOPROC, ENOSERVICE, ENOTCONTROLLER, ENOTENQUEUED, ENOTJOINED, ENOTSTOPPED, EREMDEV, EWRONGFS. * lib/strerrorname_np.c (strerrorname_np): Likewise. * tests/test-strerrorname_np.c (main): Likewise.