How to delete scheduled job in salesforce

Solution 1:

Step 1: Go to setup --> Jobs  --> Scheduled Jobs.

Here you will find list of all scheduled jobs

Step 2: Select the job to be deleted. Click on the delete Action of the particular job to be deleted.

Here I am deleting "My Job" scheduled job



Solution 2: If you know cronId, then you can abort the scheduled job by executing the following

 line from execute anonymous block

System.abortJob(cronid);