Remove slack notifications for Job Reaper

[bio-boris]

e.g.

EE2 Held Job reaper failed for https://appdev.kbase.us/services/ee2  (job Unknown), JobEventLog not initialized.  Check the debug log, looking for ReadUserLog or FileModifiedTrigger.  (Or call htcondor.enable_debug() and try again.). Please check it out
5:25 PM
Execution Engine Notifications
EE2 Held Job reaper failed for https://staging.kbase.us/services/ee2  (job Unknown), JobEventLog not initialized.  Check the debug log, looking for ReadUserLog or FileModifiedTrigger.  (Or call htcondor.enable_debug() and try again.). Please check it out
5:25 PM
Execution Engine Notifications
EE2 Held Job reaper failed for https://next.kbase.us/services/ee2  (job Unknown), JobEventLog not initialized.  Check the debug log, looking for ReadUserLog or FileModifiedTrigger.  (Or call htcondor.enable_debug() and try again.). Please check it out

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