NEXUS-6153 - drop jetty-kitchen-sink.xml example

same can be achieved with

wrapper.app.parameter.1=./conf/jetty.xml
wrapper.app.parameter.2=./conf/jetty-requestlog.xml
wrapper.app.parameter.3=./conf/jetty-https.xml
wrapper.app.parameter.4=./conf/jetty-http-redirect-to-https.xml
wrapper.app.parameter.5=./conf/jetty-jmx.xml