The shortest on my list is GC, which they removed after a short 4 years of deprecation. I'm short on examples of things that were deprecated one year and then removed the next couple years. If you have some?

They could remove Perl/Python/Ruby this year, having only deprecated them last year. Historically they're not inclined to do so, but I'd expect those to be left deprecated until some event permitted their removal to be more convenient (like "new architecture added", which would force a global recompile, at which point lots of deprecated things can go away more smoothly — OpenSSL, OpenGL, P/P/R, etc.)