Drop compatibility with smart_proxy_openscap < 0.6.1

If this was still needed, we could use capabilities and easily check
this statically but version 0.6.1 was released in 2017 so by now it's
safe to assume it's new enough.

Dropping the old code makes it more reliable and we have less code to
maintain.

app/controllers/api/v2/compliance/tailoring_files_controller.rb

@@ -6,7 +6,6 @@ class TailoringFilesController < ::Api::V2::BaseController
       include ForemanOpenscap::Api::V2::ScapApiControllerExtensions
 
       before_action :find_resource, :except => %w[index create]
-      before_action :openscap_proxy_check, :only => %w[create]
 
       api :GET, '/compliance/tailoring_files', N_('List Tailoring files')
       param_group :search_and_pagination, ::Api::V2::BaseController
@@ -77,13 +76,6 @@ def action_permission
           super
         end
       end
-
-      def openscap_proxy_check
-        unless ForemanOpenscap::TailoringFile.any?
-          check = ForemanOpenscap::OpenscapProxyVersionCheck.new.run
-          render_error :custom_error, :status => :unprocessable_entity, :locals => { :message => check.message } unless check.pass?
-        end
-      end
     end
   end
 end

app/models/concerns/foreman_openscap/host_extensions.rb

@@ -102,9 +102,7 @@ def policies_enc
     end
 
     def policies_enc_raw
-      check = ForemanOpenscap::OpenscapProxyAssignedVersionCheck.new(self).run
-      method = check.pass? ? :to_enc : :to_enc_legacy
-      combined_policies.map(&method)
+      combined_policies.map(&:to_enc)
     end
 
     def combined_policies

app/models/foreman_openscap/policy.rb

@@ -196,10 +196,6 @@ def to_enc
       }.merge(period_enc)
     end
 
-    def to_enc_legacy
-      to_enc.tap { |hash| hash['download_path'] = "/compliance/policies/#{self.id}/content" }
-    end
-
     def should_validate?(step_name)
       if new_record? && wizard_initiated?
         step_index > step_to_i(step_name)

app/views/tailoring_files/welcome.html.erb

@@ -8,14 +8,7 @@
     <%= (_('In Foreman, tailoring_files represent the custom modifications to default XCCDF profiles and they can be applied to hosts
     via %s') % link_to('compliance policies', policies_path)).html_safe %>
   </p>
-  <% proxy_check = run_tailoring_proxy_check %>
   <div class="blank-slate-pf-main-action">
-    <%= new_link(_('New Tailoring File'), {}, { :class => "btn-lg", :disabled => !proxy_check.pass? }) %>
+    <%= new_link(_('New Tailoring File'), {}, { :class => "btn-lg" }) %>
   </div>
-
-  <p>
-  <% unless proxy_check.pass? %>
-    <%= alert :class => 'alert-warning', :header => '', :text => proxy_check.message.html_safe %>
-  <% end %>
-  </p>
 </div>

test/functional/api/v2/compliance/tailoring_files_controller_test.rb

@@ -24,8 +24,6 @@ class Api::V2::Compliance::TailoringFilesControllerTest < ActionController::Test
   test "should create tailoring_file" do
     tf = FactoryBot.build(:tailoring_file)
     tf_params = { :name => tf.name, :original_filename => tf.original_filename, :scap_file => tf.scap_file }
-    ForemanOpenscap::OpenscapProxyVersionCheck.any_instance.stubs(:openscap_proxy_versions)
-                                              .returns({})
     post :create, :params => tf_params, :session => set_session_user
     assert_response :success
   end
@@ -50,13 +48,4 @@ class Api::V2::Compliance::TailoringFilesControllerTest < ActionController::Test
     assert_response :ok
     refute ForemanOpenscap::ScapContent.exists?(tailoring_file.id)
   end
-
-  test "should not create tailoring file when there is outdated proxy version" do
-    tf = FactoryBot.build(:tailoring_file)
-    tf_params = { :name => tf.name, :original_filename => tf.original_filename, :scap_file => tf.scap_file }
-    ForemanOpenscap::OpenscapProxyVersionCheck.any_instance.stubs(:openscap_proxy_versions)
-                                              .returns('test-proxy' => '0.5.4')
-    post :create, :params => tf_params, :session => set_session_user
-    assert_response :unprocessable_entity
-  end
 end