gcj: remove aliases for local variables

[Andrew Haley]

Tom Tromey writes:
 > >>>>> "Michael" == Michael Koch <konqueror@gmx.de> writes:
 > 
 > >> The bytecode front-end of gcj has long produced worse debug
 > >> information than the source front-end, partly due to the problem of
 > >> representing debug information for local variables.  
 > 
 > Michael> Is it possible or worth to backport this to the 4.1 branch?
 > 
 > It is possible but I tend to lean against it.
 > I'm open to an argument for it though.

There are no big pluses and no big minuses that I can see.  In other
words, if someone else wants to do the work I'll approve it, but I'm
not willing to do it myself.  :-)

Andrew.