Some time ago, we were "labeling" callbacks so that we could use
a specially modified profiler to identify time spent per specific
callback. This became largely unnecessary thanks to the
jitprofiler mod, which shows specific line numbers anyway. Now,
the labeling has actually even broken because it interferes with
MT's newest built-in instrumentation, which expects functions, not
callable tables. Since the indirection wasn't helping, and could
only have caused some small performance costs anyway, we might as
well just remove it instead of trying to make it work.
Unfortunately "labeled" callbacks were all over the game, so now
these all have to be removed...
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