doc: remove link to http://golanguage.ru/ I check it for several months and it always says ERR_NAME_RESOLUTION_FAILED
doc: remove link to http://golanguage.ru/
I check it for several months and it always says
ERR_NAME_RESOLUTION_FAILED

R=golang-dev, bradfitz
CC=golang-dev
http://codereview.appspot.com/5272041

tv42/old-go,apparentlymart/golang,apparentlymart/golang,tv42/old-go,tv42/old-go,gnanderson/go,apparentlymart/golang,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,tv42/old-go,gnanderson/go,apparentlymart/golang,apparentlymart/golang,dsriram/golang,gnanderson/go,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,tv42/old-go,apparentlymart/golang,dsriram/golang,pombredanne/go-deleteme,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,gnanderson/go,dsriram/golang,dsriram/golang