Twenty Fifteen: admin-custom-header.css was emptied in r30567 so let's remove it entirely.

Props kwight, fixes #30648.


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git-svn-id: http://core.svn.wordpress.org/trunk@30791 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: we should be checking for twentyfifteen_get_color_scheme_choices here not twentyfifteen_get_color_scheme_control_options

Props iamtakashi, fixes #30652


Built from https://develop.svn.wordpress.org/trunk@30802


git-svn-id: http://core.svn.wordpress.org/trunk@30792 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: prevent jumping on hover in blog footer links with Safari

Props iamtakashi, fixes #30654.


Built from https://develop.svn.wordpress.org/trunk@30803


git-svn-id: http://core.svn.wordpress.org/trunk@30793 1a063a9b-81f0-0310-95a4-ce76da25c4cd