builder.vmware.iso: remove duplicate Format field

builder/vmware/iso/config.go

@@ -81,13 +81,6 @@ type Config struct {
 	//   Guide](https://www.vmware.com/pdf/VirtualDiskManager.pdf) for desktop
 	//   VMware clients. For ESXi, refer to the proper ESXi documentation.
 	DiskTypeId string `mapstructure:"disk_type_id" required:"false"`
-	// Either "ovf", "ova" or "vmx", this specifies the output
-	// format of the exported virtual machine. This defaults to "ovf".
-	// Before using this option, you need to install ovftool. This option
-	// currently only works when option remote_type is set to "esx5".
-	// Since ovftool is only capable of password based authentication
-	// remote_password must be set when exporting the VM.
-	Format string `mapstructure:"format" required:"false"`
 	// The adapter type (or bus) that will be used
 	// by the cdrom device. This is chosen by default based on the disk adapter
 	// type. VMware tends to lean towards ide for the cdrom device unless