gerrit.json: remove --nomaster_bazelrc

Change-Id: I3cb12f959d87033f8cbf563669189f826e8f74e7
diff --git a/jenkins/jobs/configs/gerrit.json b/jenkins/jobs/configs/gerrit.json
index 1fb8d25..ea9b88a 100644
--- a/jenkins/jobs/configs/gerrit.json
+++ b/jenkins/jobs/configs/gerrit.json
@@ -20,9 +20,6 @@
             {"node": "windows-x86_64"}
         ],
         "parameters": {
-            "startup_opts": [
-                "--nomaster_bazelrc"
-            ],
             "build_opts": [
                 "--workspace_status_command=tools/workspace-status.cmd",
                 "--verbose_failures"