If the stream's start time is more than 1 hour away, you can delete as follows:
Step 1: Go 'Manage Stream' section. Select the relevant scheduled match.
Step 2: Click 'Delete Scheduled Stream'.
If the stream's start time is less than 1 hour away, you will not be able to delete the stream. Instead, you will need to terminate the stream as follows:
Step 1: Go 'Manage Stream' section. Select the relevant scheduled match.
Step 2: Click 'Stop Stream'.