Removed unnecessary language environment variables for ipython notebooks.

See the comments at [this MR](nexedi/slapos!193).

/reviewed-on nexedi/slapos!200

software/ipython_notebook/buildout.hash.cfg

@@ -16,7 +16,7 @@
 
 [instance-jupyter]
 filename = instance.cfg.in
-md5sum = c9d2c7a3658457b7f43cbbbc38ef247c
+md5sum = 2c0ecc6f045504cb037709429132e08c
 
 [ipython-notebook-config]
 filename = template/ipython_notebook_config.py.jinja

software/ipython_notebook/instance.cfg.in

@@ -78,9 +78,7 @@ parameters-extra = true
 environment =
   IPYTHONDIR=${directory:ipython_dir}
   JUPYTER_CONFIG_DIR=${directory:ipython_dir}
-  LC_ALL=C.UTF-8
   LANG=C.UTF-8
-  LANGUAGE=C.UTF-8
 
 [ipython-notebook-config]
 <= dynamic-jinja2-template-base