mixer_module: remove unused limit_callbacks_to_primary argument

src/drivers/tap_esc/TAP_ESC.cpp

@@ -404,7 +404,7 @@ void TAP_ESC::Run()
 	}
 
 	// check at end of cycle (updateSubscriptions() can potentially change to a different WorkQueue thread)
-	_mixing_output.updateSubscriptions(true, true);
+	_mixing_output.updateSubscriptions(true);
 
 	perf_end(_cycle_perf);
 }