Import: Remove "Blogroll" import option (for links in OPML format) from the...

Import: Remove "Blogroll" import option (for links in OPML format) from the list of popular importer plugins.

Link Manager is disabled for new installations since WordPress 3.5, so core should not encourage importing links.

See #meta4706 for the corresponding WordPress.org API change.

Props Ipstenu, hareesh-pillai, DrewAPicture, nacin, karmatosed, dd32, garrett-eclipse.
Fixes #22994. See #21307.
Built from https://develop.svn.wordpress.org/trunk@47227


git-svn-id: https://core.svn.wordpress.org/trunk@47027 1a063a9b-81f0-0310-95a4-ce76da25c4cd