Drop debug prints from TcTask's ist-value change handlers

on_temp_ist_changed/on_rate_ist_changed printed every update in
addition to forwarding it over the WebSocket, spamming stdout once
per controller tick.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tasks/tempctrl.py

@@ -30,11 +30,9 @@ class TcTask(ATask):
 		asyncio.create_task(self.send({'Soll': {'Rate': {'Set': value}}}))
 
 	def on_temp_ist_changed(self, value):
-		print ("Temp ist change to {}".format(value))
 		asyncio.create_task(self.send({'Ist': {'Temp': value}}))
 
 	def on_rate_ist_changed(self, value):
-		print ("Rate ist change to {}".format(value))
 		asyncio.create_task(self.send({'Ist': {'Rate': value}}))
 
 	async def recv(self, msg):