fix: remove unnecessary double quotes in strings

[aribray]

Change-Id: I79373e42991c2872ff0f8be215bbfa5b4b460f0c

tables_client.py uses double quotes for string wrapping. The python-automl linter configuration is set to ignore PEP8 E501 errors ("Line too long"), so the string wrapping is unnecessary.

Fixes #230 🦕
Closes #229

[tseaver]

@aribray Even though flake8 won't complain about the long lines, we use blacken to keep our code formatted uniformly, and it sets a maximum line length of 88 characters -- some of your changes will cause CI to fail. Try running nox -s lint locally: it runs black in "check" mode, and will fail.

Removing the ones in the examples linked from #230 should be fine, as that actually shortens those lines. However, the files where those examples occur are in generated code, which means that you need either to apply your changes as replacements in owlbot.py, or else work to get the upstream generator to do it for us.

[aribray]

@tseaver Thanks! I did run nox -s lint, and it succeeded. But everything you mentioned does make sense. I'll refresh my memory on owlbot.py

[busunkim96]

The 3.7 failure looks like a flake, please try re-running it.