build/ci: remove bazelisk update as the builder image got updated

Change-Id: I5494d540dd89da32c3c05575d26d7af6b7fcf74e
Reviewed-on: https://review.monogon.dev/c/monogon/+/1480
Reviewed-by: Leopold Schabel <leo@monogon.tech>
Tested-by: Jenkins CI
diff --git a/build/ci/jenkins-presubmit.groovy b/build/ci/jenkins-presubmit.groovy
index 7be25c2..c0162c6 100644
--- a/build/ci/jenkins-presubmit.groovy
+++ b/build/ci/jenkins-presubmit.groovy
@@ -2,9 +2,6 @@
 // executed by Jenkins for presubmit checks, ie. checks that run against an
 // open Gerrit change request.
 
-// TODO(leo): remove once CI image has been updated.
-def gazelle_build = "curl -o ~/bazelisk https://storage.googleapis.com/monogon-infra-public/bazelisk-v1.15.0 && chmod +x ~/bazelisk"
-
 pipeline {
     agent none
     options {
@@ -24,7 +21,6 @@
                         gerritCheck checks: ['jenkins:test': 'RUNNING'], message: "Running on ${env.NODE_NAME}"
                         echo "Gerrit change: ${GERRIT_CHANGE_URL}"
                         sh "git clean -fdx -e '/bazel-*'"
-                        sh gazelle_build
                         sh "JENKINS_NODE_COOKIE=dontKillMe ~/bazelisk test //..."
                         sh "JENKINS_NODE_COOKIE=dontKillMe ~/bazelisk test -c dbg //..."
                     }
@@ -49,7 +45,6 @@
                         gerritCheck checks: ['jenkins:gazelle': 'RUNNING'], message: "Running on ${env.NODE_NAME}"
                         echo "Gerrit change: ${GERRIT_CHANGE_URL}"
                         sh "git clean -fdx -e '/bazel-*'"
-                        sh gazelle_build
                         sh "JENKINS_NODE_COOKIE=dontKillMe ~/bazelisk run //:gazelle-update-repos"
                         sh "JENKINS_NODE_COOKIE=dontKillMe ~/bazelisk run //:gazelle -- update"
                         sh "JENKINS_NODE_COOKIE=dontKillMe ~/bazelisk run //:go -- mod tidy"