Disable experimental job trigger

Signed-off-by: Mark Vieira <portugee@gmail.com>

.ci/jobs.t/elastic+elasticsearch+{branch}+periodic-next.yml

@@ -3,5 +3,4 @@
     workspace: /dev/shm/elastic+elasticsearch+%BRANCH%+periodic
     display-name: "elastic / elasticsearch # %BRANCH% - periodic (experimental)"
     description: "Periodic testing of the Elasticsearch %BRANCH% branch.\n"
-    triggers:
-      - timed: "H H/1 * * *"
+    triggers: []