fix mod_proxy_html on FreeBSD

The files are already included in the base port/package, the separate
port was EOLed in 2018:
https://www.freshports.org/www/mod_proxy_html

Author: fraenki

manifests/params.pp

@@ -519,7 +519,6 @@
       'passenger'   => 'www/rubygem-passenger',
       'perl'        => 'www/mod_perl2',
       'phpXXX'      => 'www/mod_phpXXX',
-      'proxy_html'  => 'www/mod_proxy_html',
       'python'      => 'www/mod_python3',
       'wsgi'        => 'www/mod_wsgi',
       'dav_svn'     => 'devel/subversion',

spec/classes/mod/proxy_html_spec.rb

@@ -46,7 +46,6 @@
     it { is_expected.to contain_class('apache::params') }
     it { is_expected.to contain_apache__mod('proxy_html').with(loadfiles: nil) }
     it { is_expected.to contain_apache__mod('xml2enc').with(loadfiles: nil) }
-    it { is_expected.to contain_package('www/mod_proxy_html') }
   end
   context 'on a Gentoo OS', :compile do
     include_examples 'Gentoo'