There's nothing suspicious in the security check. Mightytext is getting access to a Google login token from somewhere through a Google account authorisation.
There is nowhere within user land to disable this token because Mightytext access is not listed a anywhere in the list of authorised apps or sites. This shouldn't be happening and seems to be a security problem: because Mightytext initially uses an Android local token, its use of a Google account server token is not subject to user control! -- You received this message because you are subscribed to the Google Groups "Android Security Discussions" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-security-discuss+unsubscr...@googlegroups.com. To post to this group, send email to android-security-discuss@googlegroups.com. Visit this group at http://groups.google.com/group/android-security-discuss. For more options, visit https://groups.google.com/d/optout.