There is a command group 'az_eventgrid_event subscription'. This group of commands could 'manage event subscriptions'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_eventgrid_event subscription_delete'.The syntax is: az eventgrid event-subscription delete --name
                                       [--source-resource-id]. The 1th example of the child command would be to use it to 'delete an event subscription for an event grid topic', the syntax is: az eventgrid event-subscription delete --name es1 \
    --source-resource-id /subscriptions/{SubID}/resourceGroups/{RG}/providers/Microsoft.EventGrid/topics/topic1. The 2th example of the child command would be to use it to 'delete an event subscription for an event grid domain topic', the syntax is: az eventgrid event-subscription delete --name es1 \
    --source-resource-id /subscriptions/{SubID}/resourceGroups/{RG}/providers/Microsoft.EventGrid/domains/domain1/topics/topic1. The 3th example of the child command would be to use it to 'delete an event subscription for an event grid domain', the syntax is: az eventgrid event-subscription delete --name es1 \
    --source-resource-id /subscriptions/{SubID}/resourceGroups/{RG}/providers/Microsoft.EventGrid/domains/domain1. The 4th example of the child command would be to use it to 'delete an event subscription for an azure subscription', the syntax is: az eventgrid event-subscription delete --name es2 \
    --source-resource-id /subscriptions/{SubID}. The 5th example of the child command would be to use it to 'delete an event subscription for a resource group', the syntax is: az eventgrid event-subscription delete --name es3 \
    --source-resource-id /subscriptions/{SubID}/resourceGroups/{RG}. The 6th example of the child command would be to use it to 'delete an event subscription for a storage account', the syntax is: az eventgrid event-subscription delete --name es3 \
    --source-resource-id /subscriptions/{SubID}/resourceGroups/{RG}/providers/microsoft.storage/storageaccounts/kalsegblob. The parameter '--name -n' is required. It is used to name of the event subscription.. The parameter '--source-resource-id' is optional. fully qualified identifier of the azure resource whose event subscription needs to be deleted.. 