Drop deprecated fallback to openrc

It was deprecated 3 years ago when we introduced the logic to use
clouds.yaml [1].

[1] 08bf393ee48723cd344ff5bce37843c41878914c

Change-Id: Idac578f2a1ee37b51bfb1320340315154fe2871d
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

lib/puppet/provider/keystone.rb

@@ -155,14 +155,11 @@ class Puppet::Provider::Keystone < Puppet::Provider::Openstack
   end
 
   def self.get_auth_url
-    auth_url = nil
     if ENV['OS_AUTH_URL']
-      auth_url = ENV['OS_AUTH_URL'].dup
-    elsif auth_url = get_os_vars_from_rcfile(rc_filename)['OS_AUTH_URL']
+      ENV['OS_AUTH_URL'].dup
     else
-      auth_url = auth_endpoint
+      auth_endpoint
     end
-    return auth_url
   end
 
   def self.project_request(service, action, properties=nil, options={})

spec/unit/provider/keystone_spec.rb

@@ -110,15 +110,7 @@ id="the_user_id"
       expect(klass.get_auth_url).to eq('http://127.0.0.1:5001')
     end
 
-    it 'should return the OS_AUTH_URL from the openrc file when there is no OS_AUTH_URL in the environment' do
-      home = ENV['HOME']
-      ENV.clear
-      mock = {'OS_AUTH_URL' => 'http://127.0.0.1:5001'}
-      expect(klass).to receive(:get_os_vars_from_rcfile).with("#{home}/openrc").and_return(mock)
-      expect(klass.get_auth_url).to eq('http://127.0.0.1:5001')
-    end
-
-    it 'should use auth_endpoint when nothing else is available' do
+    it 'should use auth_endpoint when OS_AUTH_URL is not set' do
       ENV.clear
       mock = 'http://127.0.0.1:5001'
       expect(klass).to receive(:auth_endpoint).and_return(mock)