useradd: use built-in settings by default

Avoids installing inconsistent settings. The correct ones would be
written as soon as an admin uses useradd -D to modify the defaults.

etc/Makefile.am

@@ -4,8 +4,7 @@
 sysconf_DATA = login.defs
 
 defaultdir = $(sysconfdir)/default
-default_DATA = \
-	useradd
+default_DATA =
 
 nonpam_files = \
 	limits \

etc/useradd

@@ -1,8 +0,0 @@
-# useradd defaults file
-GROUP=1000
-HOME=/home
-INACTIVE=-1
-EXPIRE=
-SHELL=/bin/bash
-SKEL=/etc/skel
-CREATE_MAIL_SPOOL=yes