Remove Babel and any signs of translations

DIB does not currently have any translations or translatable strings,
so removing local configuration from setup.cfg.

Additionally, Babel is only required if you import it directly,
removing it as well.

Change-Id: I036de97641df38eef408290b50cecfe216c69f6d

babel.cfg

@@ -1 +0,0 @@
-[python: **.py]

lower-constraints.txt

@@ -1,7 +1,6 @@
 alabaster==0.7.10
 appdirs==1.3.0
 astroid==1.6.2
-Babel==2.3.4
 coverage==4.0
 decorator==3.4.0
 docutils==0.11

requirements.txt

@@ -1,7 +1,6 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-Babel!=2.4.0,>=2.3.4 # BSD
 # NOTE(fdegir): NetworkX 2.3 dropped support for Python 2
 networkx>=1.10,<2.3;python_version<'3.0' # BSD
 networkx>=1.10;python_version>='3.4' # BSD

setup.cfg

@@ -43,20 +43,6 @@ scripts =
 data_files =
     share/diskimage-builder/scripts = scripts/*
 
-[extract_messages]
-keywords = _ gettext ngettext l_ lazy_gettext
-mapping_file = babel.cfg
-output_file = diskimage_builder/locale/diskimage_builder.pot
-
-[update_catalog]
-domain = diskimage_builder
-output_dir = diskimage_builder/locale
-input_file = diskimage_builder/locale/diskimage_builder.pot
-
-[compile_catalog]
-directory = diskimage_builder/locale
-domain = diskimage_builder
-
 [wheel]
 universal = 1