chore(docs): remove get_default_handler call from samples/snippets/handler.py

[csudcy]

Since client.setup_logging() calls self.get_default_handler(**kw) internally, I don't think the call here is needed (e.g. it's not showing the users how to do something else).

Apologies, I'm currently doing this through the Github UI; I don't see how this could break tests (but that's the point of having tests) but if I need to run the tests/linter/coverage, please let me know.

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Make sure to open an issue as a bug/issue before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Fixes #420

[csudcy]

Dangit, didn't see the conventionalcommits.org requirement in the contributing docs; can't work out how to change commit messages through Github UI so will get on the command line later to change it.

[daniel-sanche]

Don't worry about changing the commits. PRs are squashed based on PR name, so as long as the name follows conventions, it'll be fine. The Cloud Build and 3.10 tests are also expected to fail now, as we're in the process of adding new tests

As for the change itself, It makes sense. We may want to make a different sample showing users how to access the default_handler, but we can address that in the upcoming v3.0.0 docs update

Thanks for opening this!

[leahecole]

LGTM if tests are passing

[daniel-sanche]

It looks like they only failing tests are Cloud Build (not fully implemented) and Python 3.10 (known issue, still rolling out)