homing: Don't raise a TimeoutError from home_wait()

Change home_wait() to return if the homing operation completed
succesfully or not.  This simplifies the callers.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/probe.py

@@ -295,7 +295,6 @@ class ProbeEndstopWrapper:
         self.home_start = self.mcu_endstop.home_start
         self.home_wait = self.mcu_endstop.home_wait
         self.query_endstop = self.mcu_endstop.query_endstop
-        self.TimeoutError = self.mcu_endstop.TimeoutError
     def _build_config(self):
         kin = self.printer.lookup_object('toolhead').get_kinematics()
         for stepper in kin.get_steppers():