ESP32S2: Fix watchdog deinit

[microdev1]

Delete subscribed task before watchdog deinit. Fixes #4324.

[tylercrumpton]

Tested this with my sample watchdog deinit() script, and it all looks good here! The script:

from watchdog import WatchDogMode, WatchDogTimeout
from microcontroller import watchdog as w

print("Initial mode:", w.mode)
w.timeout = 10  # Set a timeout of 10 seconds
w.mode = WatchDogMode.RESET
w.feed()
print("Watchdog running mode:", w.mode)
w.deinit()
print("After deinit mode:", w.mode)

while True:
    try:
        while True:
            pass
    except WatchDogTimeout:
        print("The watchdog got hungry!")

And the output:

Initial mode: None
Watchdog running mode: watchdog.WatchDogMode.RESET
After deinit mode: None

The watchdog successfully stops and allows me to start it again!

Thanks for the fix!

[dhalbert]

Thank you for the quick fix, and @tylercrumpton, thanks for testing!

[dhalbert]

Ignoring single failure due to build cache.