fix: remove bad test case

[ilaumjd]

Description:

• Tasks solved
  One bad test case query_without_code_or_pre_block where it is comparing hardcoded string into howdoi search result which can be changing anytime.
  Please check @gleitz

Pull Request type:

• Test fix

How to test:

Please provide detailed instructions for testing your changes locally, including expected response/behavior.

Pull Request checklist:

• Read the contributing_to_howdoi.md
• Attach screenshots of expected behavior.
• The changes pass tests locally (nose2).
• There are no linting errors (python setup.py lint).
• The changes don't break existing features.
• Check that there are no confidential files like .env included.
• Request review from the maintainers.
• For bug fixes or changes to directory structure, make sure docs are updated.

Known bugs (if any):

If there are bugs in your current changes you can still open the PR and mention the bugs you found. Propose further changes that can help fix bugs in your current changes.

[gleitz]

Thanks! Hard to keep up with the top answer :)