cli: remove old find_all_supported_devices()

This API was deprecated in 1.3.0rc1 (2+ years ago), and there are
currently no known users.

GKraken used it, but switched to <driver>.find_supported_devices().

This change is not visible to users of the CLI.

liquidctl/cli.py

@@ -484,11 +484,5 @@ def main():
     sys.exit(0)
 
 
-def find_all_supported_devices(**opts):
-    """Deprecated."""
-    _LOGGER.warning('deprecated: use liquidctl.driver.find_liquidctl_devices instead')
-    return find_liquidctl_devices(**opts)
-
-
 if __name__ == '__main__':
     main()

tests/test_backward_compatibility_10.py

@@ -22,11 +22,6 @@ SPECTRUM = [
 ]
 
 
-def test_pre11_apis_find_does_not_raise():
-    import liquidctl.cli
-    liquidctl.cli.find_all_supported_devices()
-
-
 def test_pre11_apis_deprecated_super_mode(mockKrakenXDevice):
     # deprecated in favor of super-fixed, super-breathing and super-wave
     mockKrakenXDevice.set_color('sync', 'super', [(128, 0, 255)] + SPECTRUM, 'normal')