Remove last_parm_insn

[Andrew Pinski]

> 
> I believe the change causes:
> 
> stage1/xgcc -Bstage1/ -B/home/dave/opt/gnu/gcc/gcc-3.5.0/hppa-linux/bin/ -c   -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros -Wold-style-definition -Werror -fno-common   -DHAVE_CONFIG_H    -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include -I../../gcc/gcc/../libbanshee/libcompat -I../../gcc/gcc/../libbanshee -I../../gcc/gcc/../libbanshee/points-to  ../../gcc/gcc/function.c -o function.o
> ../../gcc/gcc/function.c: In function `fixup_var_refs_insn':
> ../../gcc/gcc/function.c:1771: warning: unused variable `next_insn'

This should be already fixed with the next set of patches from RTH.

Andrew