On the Apps page, click the app name to open its app details page.
Hover your mouse cursor to the extreme right of the flow name that you want to delete until the
Delete flow icon () displays.
Click the
Delete flow icon.
On the confirmation dialog, click
Delete.
Result
The selected flow is deleted.
Note: If multiple flows are attached to a trigger only the specific flow gets deleted, but if the flow you are deleting is the only flow attached to the trigger, the trigger gets deleted as well.