classes: Drop now unneeded update_data calls

Now that the datastore works dynamically we don't need the update_data calls
so we can just remove them. They're not actually done anything at all for
a while.

(From OE-Core rev: 8de0c5d3bd01919e2bf0394f9c485936d6098cec)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/multilib.bbclass

@@ -36,7 +36,6 @@ python multilib_virtclass_handler () {
         e.data.setVar("MLPREFIX", variant + "-")
         override = ":virtclass-multilib-" + variant
         e.data.setVar("OVERRIDES", e.data.getVar("OVERRIDES", False) + override)
-        bb.data.update_data(e.data)
         return
 
     if bb.data.inherits_class('native', e.data):