Remove 'responsible disclosure' policy

Most disclosures we receive were related to other GMU sources. Most emails were forwarded off to ITSO. This may be revived with collaboration with ITSO, but for now, we cannot run this program independently.
2 jobs for nander13-patch-1 in 47 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Build
passed build #17046

00:00:35

 
  Deploy
passed deploy_staging #17047

00:00:12