Disables radio sounds. (#6522)

Disables the radio sounds, which was an undocumented, unintended change.

code/modules/mob/hear_say.dm

@@ -83,14 +83,6 @@
 
 /mob/proc/hear_radio(var/message, var/verb="says", var/datum/language/language=null, var/part_a, var/part_b, var/mob/speaker = null, var/hard_to_hear = 0, var/vname ="")
 
-	var/radio_sound = list( 'sound/effects/radio1.ogg',
-							'sound/effects/radio2.ogg',
-							'sound/effects/radio3.ogg',
-							'sound/effects/radio4.ogg')
-
-	if(!isobserver(src))
-		playsound(loc, pick(radio_sound), 15, 0, -1)
-
 	if(!client)
 		return