Not sure on that specific mod, but I've found no problems in taking .wav's out of the sound folder from various other mods -- I think it was Free Libya that had some screeching arabic gibberish looped through the entire second mission or something that HAD to go.
Just gotta do some doubleclick-testing inside the sound folder to make sure you've located the correct offensive sound.
If anyone knows why a person shouldn't be doing this, feel free to correct me.

But it seemed to work fine, no problems from the manual removal.
-Snorp