profile::base: rm dbus

Not sure why we ever cared whether `dbus` was installed, but it's part
of the default Debian install, so whatever the original reason, this
line effectively a no-op.

Note: `dbus` package was added in aaaacd2, part of
#1.

Author: rrotter

manifests/profile/base.pp

@@ -30,7 +30,6 @@
   }
 
   ensure_packages([
-    'dbus', # ??
     'zstd', # prevent warnings about fallback on `apt dist-upgrade`
   ])
 

spec/classes/profile/base_spec.rb

@@ -21,7 +21,6 @@ def contain_base_class(name)
       case os
       when %r{^debian}, %r{^ubuntu}
         it { is_expected.to contain_package("zstd") }
-        it { is_expected.to contain_package("dbus") }
 
         it do
           expect(subject).to contain_file("/etc/localtime")