Remove Invite noscript support for group invitations screens

Fixes #5281

Props imath

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8093 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Pinking shears

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8094 cdf35c40-ae34-48e0-9cc9-0c9da1808c22