search for: deprecatedish

While looking at why some generated code for SPARC was poor, I ran into the fact that the MachineScheduler is not yet enabled by default -- it's opt in for each target. Having a bunch of deprecatedish code around was a bit confusing for newbie me. So, I suggested on IRC that perhaps it's been long enough by now that any target that hasn't switched over probably isn't actually caring much for the performance of their target. Has the time come to start getting rid of the old Selection...