Delete old files resurrected by cvs2git.

bcheck:
compiler/call_graph.m:
compiler/implication.m:
compiler/ml_dense_switch.m:
compiler/vn_livemap.m:
library/nc_builtin.m:
library/np_builtin.m:
runtime/Makefile.conf.in:
runtime/autoconf.h.in:
runtime/conf.h:
runtime/configure.in:
runtime/ext_signal.h:
runtime/ext_stdio.h:
runtime/ext_stdlib.h:
runtime/iface.h:
runtime/iface.mod:
runtime/iface_g.y:
runtime/iface_s.l:
runtime/io.h:
runtime/io.mod:
runtime/list.c:
runtime/list.h:
	As above.