refactor(dbus): Fix typo and remove unused thread instance

Corrected a typo in the `timeout` parameter name in `method_await_reset`
and removed an unused thread instance `th_sleep` from `dbus_helper.py`.
These changes improve code clarity and eliminate redundant components.

src/revpi_middleware/cli_commands/cli_picontrol.py

@@ -44,10 +44,11 @@ def method_reset():
     log.info("ResetDriver called via D-Bus")
 
 
-def method_await_reset(timout: int = 0):
+def method_await_reset(timeout: int = 0):
     detected_signal = await_signal(
         "NotifyDriverReset",
-        timout, extend_interface("picontrol"),
+        timeout,
+        extend_interface("picontrol"),
         bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
     )
     if detected_signal:

src/revpi_middleware/cli_commands/dbus_helper.py

@@ -96,7 +96,6 @@ def await_signal(
     detected_signal = False
     timeout = int(timeout)
     loop = GLib.MainLoop()
-    th_sleep = Thread()
 
     def th_timeout():
         sleep(timeout)