getty: unset locale before execution

getty: unset locale before execution

On the console indian characters cannot be displayed, hence it is
advisable to disable indian locales on the console, which most
distributions traditionally did from a shell fragment executed post
login. If getty gets started with locale settings passed it would itself
however be translated without the no-indian-on-console fixup applied.

Hence, for now don't pass any locale settings to getty/login, and thus
rely on the classic post-login script fragment to set and fix the
locale.

Eventually we probably want to drop this again since the system locale
should be read and set at one place, and not at multiple, and that one
place should be PID 1.

https://bugzilla.redhat.com/show_bug.cgi?id=663900