driver/powerdriver: drop obsolete delays in PDUDaemonDriver

Now that [1] is merged, we can drop the sleeps that waited for pdudaemon
to execute the request. Note that [1] is not part of a release, yet.

[1] pdudaemon/pdudaemon#78

Signed-off-by: Bastian Krause <bst@pengutronix.de>

labgrid/driver/powerdriver.py

@@ -396,21 +396,18 @@ def on_activate(self):
     def on(self):
         r = self._requests.get(self._build_url('on'))
         r.raise_for_status()
-        time.sleep(1)  # give pdudaemon some time to execute the request
 
     @Driver.check_active
     @step()
     def off(self):
         r = self._requests.get(self._build_url('off'))
         r.raise_for_status()
-        time.sleep(1)  # give pdudaemon some time to execute the request
 
     @Driver.check_active
     @step()
     def cycle(self):
         r = self._requests.get(self._build_url('reboot'))
         r.raise_for_status()
-        time.sleep(self.delay + 1)  # give pdudaemon some time to execute the request
 
     @Driver.check_active
     def get(self):