GrampsLocale: Remove get_translation()

Only one base translation per locale. To set up a different locale
on any axis (locale, domain, directory, or languages) instantiate a
secondary locale by calling GrampsLocale() with the appropriate
arguments.

svn: r21968

gramps/gui/plug/_guioptions.py

@@ -36,7 +36,7 @@ from __future__ import unicode_literals
 #
 #------------------------------------------------------------------------
 from gramps.gen.const import GRAMPS_LOCALE as glocale
-_ = glocale.get_translation().gettext
+_ = glocale.translation.gettext
 import os
 import sys