ucontext: removed unused code
ucontext: removed unused code

dinfuehr/dora,dinfuehr/dora,riginding/dora,dinfuehr/dora,dinfuehr/dora,riginding/dora,dinfuehr/dora,riginding/dora,riginding/dora,riginding/dora,dinfuehr/dora,riginding/dora,riginding/dora