Revert "Merge pull request #598 from alphagov/bugfix/131975557_delete_metron_agent_rsyslog_config_as_adhoc_task"
Revert "Merge pull request #598 from alphagov/bugfix/131975557_delete_metron_agent_rsyslog_config_as_adhoc_task"

We did run the cleanup task in all environments, we don't need this
adhoc task anymore.

This reverts commit a024ce3c4c1f0318fc035bf7f751cb411f2d519c, reversing
changes made to 858630d3811e5f33993d5658cb545092b72642f6.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf