Newsletter: Drop dead admin-ui build-style import; pin admin-ui 2.1.0 - #49007

Newsletter: Drop dead admin-ui build-style import; pin admin-ui 2.1.0#49007

dhasilva merged 2 commits into

trunkAutomattic/jetpack:trunkfrom

fix/newsletter-admin-ui-scss-importAutomattic/jetpack:fix/newsletter-admin-ui-scss-importCopy head branch name to clipboard