puppet: Remove gettext, zulip::static_asset_compiler.

These came in via d0dcc8bf26, which looks like it copied the comment
from the provisioning code.  Production installs (even from git) do
not call `./manage.py makemessages`, so there is no reason to require
this for production deployments.

puppet/zulip/manifests/profile/standalone.pp

@@ -14,5 +14,4 @@ class zulip::profile::standalone {
   include zulip::profile::memcached
   include zulip::profile::rabbitmq
   include zulip::localhost_camo
-  include zulip::static_asset_compiler
 }

puppet/zulip/manifests/static_asset_compiler.pp

@@ -1,20 +0,0 @@
-class zulip::static_asset_compiler {
-  case $facts['os']['family'] {
-    'Debian': {
-      $static_asset_compiler_packages = [
-        # Used by makemessages i18n
-        'gettext',
-      ]
-    }
-    'RedHat': {
-      $static_asset_compiler_packages = [
-        'gettext',
-      ]
-    }
-    default: {
-      fail('osfamily not supported')
-    }
-  }
-
-  zulip::safepackage { $static_asset_compiler_packages: ensure => installed }
-}