How do I delete from crontab old commands that no longer appear in the crontab script

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#1

I use crontab to run a particular file and then get its report in the mail.
And now I no longer need it so I deleted the line of command that executes it but I still get the report by email.
How do I stop receiving the report? Do I need to reset crontab and if so how do I reset it?

#2

Edit the crontab. Like type:

crontab -e

Then it will open in a text editor and you can remove unwanted command or scripts. Save it. Then list it:

crontab -l