[MWPW-113266] fstab clean up

[qiyundai]

Please always provide the JIRA issue(s) your PR is for, as well as test URLs where your change can be observed (before and after):

Fix mwpw-133266

Description
It's exposed that some rows in the fstab.yaml are obsolete. Here's a quick PR to remove them from the file.

Test URLs:

• Before: https://main--express-website--adobe.hlx.page/express/templates/flyer?lighthouse=on
• After: https://mwpw-133266--express-website--wbstry.hlx.page/express/templates/flyer?lighthouse=on

[aem-code-sync]

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[aem-code-sync]

Page	Scores	Audits	Google
/express/templates/flyer?lighthouse=on		Lighthouse returned error: NO_FCP. The page did not paint any content. Please ensure you keep the browser window in the foreground during the load and try again. (NO_FCP)