fix: do not set default slack toekn secret (#76)

Author: alexouzounis

prow/values.yaml

@@ -4,7 +4,7 @@ podNamespace: prow-test-pods
 prowbucketname: ouzidev-testinfra-252513-prow-artefacts
 
 secrets:
-  slackToken: slack-token
+  #slackToken: slack-token
   githubToken: github-token
   oauthConfig: oauth-config
   bucketGcsCredentials: prow-bucket-gcs-credentials