[gPXE] [PATCH 0/4] [prefix] Clean out obsolete prefices

[Stefan Hajnoczi]

There are a number of prefices in gPXE which have been carried over from legacy
Etherboot but no longer work.  They are unused and no one has asked for them so
it is safe to remove them.

The bImage prefix was recently reported broken:
http://support.etherboot.org/index.php?do=details&task_id=62

Let's remove this dead code to prevent confusion.  I have broken each removal
into a separate commit so that it is easy to search for and/or revert if we
need to resurrect a prefix.

Stefan