The "Remove Schedule" action is specifically designed for active schedules. It is not an available action within the Saved Reports or Shared Reports menus.
Cloud SWG
The Recent Scheduled Reports widget on your Report Center dashboard (https://portal.threatpulse.com/#reports) displays the five most recent scheduled reports.
Locate the report in the Recent Scheduled Reports list.
Click the Actions drop-down menu next to the report name.
Select Remove Schedule.
If the report you wish to manage is not among the five most recent, or if you need to remove multiple schedules at once, use the View All management view.
At the bottom of the Recent Scheduled Reports widget, click View All Scheduled Reports.
In the full list, find the reports you wish to remove.
Note: You will only see an "Edit Schedule" link next to individual reports here.
Select the checkbox next to the report(s) you wish to unschedule.
Click the Delete option located at the top of the list.
Important: Using the Delete button in the Scheduled Reports view performs the exact same action as "Remove Schedule". It stops the schedule but does not delete the underlying Saved Report.