/// <summary>
/// Deletes an Azure SQL server firewall rule.
/// </summary>
/// <param name='operations'>
/// The operations group for this extension method.
/// </param>
/// <param name='resourceGroupName'>
/// The name of the resource group that contains the resource. You can obtain
/// this value from the Azure Resource Manager API or the portal.
/// </param>
/// <param name='serverName'>
/// The name of the Azure SQL server.
/// </param>
/// <param name='firewallRuleName'>
/// The name of the Azure SQL server firewall rule.
/// </param>
/// <param name='cancellationToken'>
/// The cancellation token.
/// </param>
public static async Task DeleteFirewallRuleAsync(this IServersOperations operations, string resourceGroupName, string serverName, string firewallRuleName, CancellationToken cancellationToken = default(CancellationToken))
{
(await operations.DeleteFirewallRuleWithHttpMessagesAsync(resourceGroupName, serverName, firewallRuleName, null, cancellationToken).ConfigureAwait(false)).Dispose();
}