add ability to delete a promotion configuration

lib/jenkins_api_client/job.rb

@@ -324,7 +324,7 @@ def build_freestyle_config(params)
               "#{params[:block_build_when_downstream_building]}")
             xml.blockBuildWhenUpstreamBuilding(
               "#{params[:block_build_when_upstream_building]}")
-            xml.triggers.vector do 
+            xml.triggers.vector do
               if params[:timer]
                 xml.send("hudson.triggers.TimerTrigger") do
                   xml.spec params[:timer]
@@ -360,7 +360,7 @@ def build_freestyle_config(params)
             xml.buildWrappers
           end
         end
-        
+
         xml_doc = Nokogiri::XML(builder.to_xml)
         plugin_collection.configure(xml_doc).to_xml
       end
@@ -449,7 +449,7 @@ def add_skype_notification(params)
       # @option artifact_params [Boolean] :default_excludes (false)
       #   exclude defaults automatically
       #
-      # @return [Nokogiri::XML::Builder] 
+      # @return [Nokogiri::XML::Builder]
       #
       def artifact_archiver(artifact_params, xml)
         return xml if artifact_params.nil?
@@ -1518,6 +1518,16 @@ def set_promote_config(job_name, process, config)
         @client.post_config("/job/#{job_name}/promotion/process/#{process}/config.xml", config)
       end
 
+      # Delete a job's promotion config
+      #
+      # @param [String] job_name
+      # @param [String] process The process name
+      # @return nil
+      def delete_promote_config(job_name, process)
+        @logger.info "Deleting promote config for job '#{job_name}' process '#{process}'"
+        @client.post_config("/job/#{job_name}/promotion/process/#{process}/doDelete")
+      end
+
       #A Method to find artifacts path from the Current Build
       #
       # @param [String] job_name

spec/unit_tests/job_spec.rb

@@ -646,6 +646,13 @@
         end
       end
 
+      describe "#delete_promote_config" do
+        it "accepts name and process and deletes promotion config" do
+          @client.should_receive(:post_config).with('/job/testjob/promotion/process/promo/doDelete')
+          @job.delete_promote_config('testjob', 'promo')
+        end
+      end
+
       describe '#scm_git' do
         before do
           @job.send(:scm_git, {