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/image.bbclass

@@ -428,7 +428,6 @@ python () {
             debug = "setup_debugfs "
             realt = t[8:]
         localdata.setVar('OVERRIDES', '%s:%s' % (realt, old_overrides))
-        bb.data.update_data(localdata)
         localdata.setVar('type', realt)
         # Delete DATETIME so we don't expand any references to it now
         # This means the task's hash can be stable rather than having hardcoded