First up, the MOH is on the CTI Ports, not the CTI Route Points. I'm not sure if that was a typo on your part, or a confusion of the topic, but I want to clear that up. You actually change this setting in UCCX under Subsystems > CM Telep > Call Control Groups.
Second, if you want to disable that audio, then just remove the steps from the script. Simply, don't use them. You don't have to. Typically you will either be doing one of three things:
1) Playing 100% of your audio from UCCX with media steps such as: play prompt, get digit string, menu, and this is the method which I like to use, because it removes all of the network traffic of holding calls, tearing down audio, setting up audio, allocating MOH servers, deallocating MOH servers, etc. And if you have 50 calls in queue all doing this, that's a lot of traffic which can be 100% avoided.
2) Now, if you want to save some bandwidth, then you're looking at MOH servers again, but this time with Multicast enabled. So you will play your hold music with the combination of: hold + delay + unhold, and do something called audio ducking in the hold music to interlace in some promo messaging or reassuring messages.
3) Or a hybrid of the two. So you loop just plain music with the: hold + delay + unhold process, but loop that such that the music only plays for like 60 seconds, with a play prompt in the loop to break it up with a promo/assurance type message.
#3 is probably the most common I see, but #2 and #1 are superior in design.
