Remove translation sections from setup.cfg

These translation sections are not needed anymore, Babel can
generate translation files without them.

Remove babel.cfg as well, this is the default role and not needed
anymore.

also remove Babel from requirements[1]
[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-April/014227.html

Change-Id: I073d3d7e2f2e8a4f06c17541a0f4d4fedcaed2dc

babel.cfg

@@ -1,2 +0,0 @@
-[python: **.py]
-

lower-constraints.txt

@@ -3,7 +3,6 @@ alembic==0.8.10
 amqp==2.1.1
 appdirs==1.4.3
 astroid==1.6.5
-Babel==2.3.4
 bandit==1.1.0
 bashate==0.5.1
 beautifulsoup4==4.6.0

setup.cfg

@@ -27,17 +27,3 @@ packages =
 console_scripts =
     osken = os_ken.cmd.osken_base:main
     osken-manager = os_ken.cmd.manager:main
-
-[compile_catalog]
-directory = os_ken/locale
-domain = os_ken
-
-[update_catalog]
-domain = os_ken
-output_dir = os_ken/locale
-input_file = os_ken/locale/os_ken.pot
-
-[extract_messages]
-keywords = _ gettext ngettext l_ lazy_gettext
-mapping_file = babel.cfg
-output_file = os_ken/locale/os_ken.pot