Turn off kokoro key-fetching until the key is available.

PiperOrigin-RevId: 225883292
Change-Id: I7e7f139d5865914c51866ea1d23220fcf221748c

kokoro/common.cfg

@@ -1,30 +0,0 @@
-# Give Kokoro access to Remote Build Executor (RBE) service account key.
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73898
-      keyname: "kokoro-rbe-service-account"
-    }
-  }
-}
-
-# Configure bazel to access RBE.
-bazel_setting {
-  # Our GCP project name
-  project_id: "copybara-shentu"
-
-  # Use RBE for execution as well as caching.
-  local_execution: false
-
-  # This must match the values in the job config.
-  auth_credential: {
-    keystore_config_id: 73898
-    keyname: "kokoro-rbe-service-account"
-  }
-
-  # Do not change unless you know what you are doing.
-  bes_backend_address: "buildeventservice.googleapis.com"
-  foundry_backend_address: "remotebuildexecution.googleapis.com"
-  upsalite_frontend_address: "https://source.cloud.google.com"
-}
-