deleteAppPermissions.ps1

#Get all permissions for the Application Registration
$currentPermissionCollection = @(az ad app permission list --id $AppId | ConvertFrom-Json)

#Remove the permissions (resourceAppId) for the Application Registration
$currentPermissionCollection | ForEach-Object {
        $permission = $PSItem
        if ($permission.Count -eq 0) { return }
        $permission.resourceAppId | ForEach-Object{
            $resourceAppId = $PSItem
            az ad app permission delete --id $AppId --api $resourceAppId
        }
    }