[mob] Adjust Tiny Mandragoras to not guard

[ThrisStraizo]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

This PR makes sure Tiny Mandragoras cannot guard, because they don't.

200+ hits, not a single guard to be found.

Steps to test these changes

Hit some tiny mandies, they won't guard.