Disable benchmarking for now until shared results instance is set up

Author: estolfo

.ci/jobs/elastic+elasticsearch-ruby+benchmark-multijob-wip+master.yml

@@ -8,7 +8,6 @@
     node: flyweight
     # trigger on demand while work in progress
     triggers:
-      - timed: '@hourly'
     builders:
       # override default
       - shell: null