[gtk-osx] Remove gettext N_ from _cmd_bootstrap_gtk_osx doc string.

[John Ralls <jralls src gnome org>]

commit 7826d62713e5134a56ec9e8e1af9141bb78f6b35
Author: John Ralls <jralls ceridwen us>
Date:   Sat Oct 26 17:09:02 2019 -0700

    Remove gettext N_ from _cmd_bootstrap_gtk_osx doc string.
    
    Nothing else is localized. Dunno what I was thinking.

 jhbuildrc-gtk-osx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/jhbuildrc-gtk-osx b/jhbuildrc-gtk-osx
index 2c6505e..ed5442a 100644
--- a/jhbuildrc-gtk-osx
+++ b/jhbuildrc-gtk-osx
@@ -68,7 +68,7 @@ class _cmd_get_srcdir(jhbuild.commands.Command):
 jhbuild.commands.register_command(_cmd_get_srcdir)
 
 class _cmd_bootstrap_gtk_osx(jhbuild.commands.base.cmd_build):
-    doc = N_('Build buildsystem tools not provided by MacOS.')
+    doc = 'Build buildsystem tools not provided by MacOS.'
 
     name = 'bootstrap-gtk-osx'