core-services/06-console-setup.sh: no need to setup ttys to unicode.

The linux kernel sets up the TTYs in unicode by default, as noted
in Documentation/kernel-parameters.txt:

vt.default_utf8=
		[VT]
		Format=<0|1>
		Set system-wide default UTF-8 mode for all tty's.
		Default is 1, i.e. UTF-8 mode is enabled for all
		newly opened terminals.