MWPW-183915: Removing style from cards. (This was added for support dark mode). We…

[joaquinrivero]

Removing style field from cards.

MILO PR: adobecom/milo#5153

Resolves https://jira.corp.adobe.com/browse/MWPW-183915
QA Checklist: https://wiki.corp.adobe.com/display/adobedotcom/M@S+Engineering+QA+Use+Cases

Please do the steps below before submitting your PR for a code review or QA

• C1. Cover code with Unit Tests
• C2. Add a Nala test (double check with #fishbags if nala test is needed)
• C3. Verify all Checks are green (unit tests, nala tests)
• C4. PR description contains working Test Page link where the feature can be tested
• C5: you are ready to do a demo from Test Page in PR (bonus: write a working demo script that you'll use on Thursday, you can eventually put in your PR)
• C.6 read your Jira one more time to validate that you've addressed all AC's and nothing is missing

Test URLs:

• Before: https://main--mas--adobecom.aem.live/studio.html
• After: https://mwpw-183915--mas--adobecom.aem.page/studio.html

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Commits

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• 960c4e4 ✅

[yesil]

for booleans, the absence of the attribute should mean false as per Lit doc.