Reduce potential for confusion on registration confirmation email

To avoid confusing our clients, we would like to remove the following section of the registration confirmation email:

We recommend a landline for audio. Use this Phone # and PIN:
Call-In Number: +1 (408) 520-2444

We use the Maestro webphone as all participants are calling from Spain. The above message can very easily confuse people as to which system they should use: Landline or Webphone.