Removed data that shouldn't have been sent to visitors on mentor and member profile pages

As part of an ongoing review of trust, safety, and privacy protections across the platform, we found that mentor and member profile pages were including an email address in the page's own data -- sent to every visitor's browser regardless of whether it was ever displayed, because it was never actually used anywhere on either page.

This wasn't a visible leak -- nothing on the page showed the address -- but data that gets sent to every visitor should be data the page actually needs, and this wasn't. It's removed now, and we didn't find any other public-facing case like it while we were looking.