After deleting JSON files from the <CONNECTALL_HOME>/Core/mappings directory, the schedule still shows in the dashboard.
ConnectALL 3.0
ConnectALL 3.1
ConnectALL 3.2
ConnectALL 3.3
This is caused by the scheduler not properly cleaning up after itself
This issue was resolved in version 3.4
Upgrading to version 3.4 will clean up the schedule.