(Swift 3,4,5...) Amazon Glacier Delete Vault Access Policy

Demonstrates how to delete the access policy associated with a specified vault.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let rest = CkoRest()!

    // Connect to the Amazon AWS REST server in the desired region.
    var bTls: Bool = true
    var port: Int = 443
    var bAutoReconnect: Bool = true
    var success: Bool = rest.connect("glacier.us-west-2.amazonaws.com", port: port, tls: bTls, autoReconnect: bAutoReconnect)

    // Provide AWS credentials.
    let authAws = CkoAuthAws()!
    authAws.accessKey = "AWS_ACCESS_KEY"
    authAws.secretKey = "AWS_SECRET_KEY"
    authAws.serviceName = "glacier"
    authAws.region = "us-west-2"

    success = rest.setAuthAws(authAws)

    // --------------------------------------------------------------------------
    // Note: The above REST connection and setup of the AWS credentials
    // can be done once.  After connecting, any number of REST calls can be made.
    // The "auto reconnect" property passed to rest.Connect indicates that if
    // the connection is lost, a REST method call will automatically reconnect
    // if needed.
    // --------------------------------------------------------------------------

    // 
    // For more information, see Glacier Delete Vault Access Policy Reference Documentation
    // 
    rest.addHeader("x-amz-glacier-version", value: "2012-06-01")

    // Delete the access policy for the "chilkat" vault.
    let sbResponseBody = CkoStringBuilder()!
    success = rest.fullRequestNoBodySb("DELETE", uriPath: "/AWS_ACCOUNT_ID/vaults/chilkat/access-policy", sb: sbResponseBody)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    var respStatusCode: Int = rest.responseStatusCode.intValue
    if respStatusCode >= 400 {
        print("Response Status Code = \(respStatusCode)")
        print("Response Header:")
        print("\(rest.responseHeader!)")
        print("Response Body:")
        print("\(sbResponseBody.getAsString()!)")
        return
    }

    // Success is indicated by a 204 response status with an empty response body.
    print("response status code = \(respStatusCode)")

}