Add proper docstring

mycroft/audio/utils.py

@@ -39,11 +39,7 @@ def wait_while_speaking():
 
 
 def stop_speaking():
-    # TODO: Less hacky approach to this once Audio Manager is implemented
-    # Skills should only be able to stop speech they've initiated
-    from mycroft.messagebus.send import send
-    send('mycroft.audio.speech.stop')
+    """Stop mycroft speech.
 
-    # Block until stopped
-    while check_for_signal("isSpeaking", -1):
-        time.sleep(0.25)
+    TODO: Skills should only be able to stop speech they've initiated
+    """