At runtime virtual/ providers make *no* sense at all. They also break debian
packaging since the "/" character is not allowed in debian package names.
This patch removes this runtime provider selection code since it is not
workable and breaks builds.
(From OE-Core rev: 887059e9c0082cb4e7fa8b5d7c9646207acd62a6)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>