Remove deprecated jekyll configuration
Remove deprecated jekyll configuration

iEgit/bfs-ru,jtanguy/talks,varya/jekyller-with-sc5,varya/empirejs-2015,piccolbo/jekyller,kstreng/TestShower,skade/presentations,varya/scotlandjs-2015,varya/func-2015,NE05KY/vectorSide,jtanguy/fp-talk,freehaha/github-intro,gau1991/ansible-intermediate,varya/func-2015,vitkarpov/bem-history,jonalmeida/jekyller,xamgore/mvc,jtanguy/fp-talk,codingnirvana/bigdata-testing,AutoSponge/jekyller,vaidus/presentations,jtanguy/elm-intro,grvrulz/wcpune2015,kstreng/TestShower,jtanguy/elm-intro,jtanguy/talks,grvrulz/wcpune2015,NE05KY/vectorSide,gau1991/ansible-intermediate,doochik/talk-moscow-spa-280215,vitkarpov/bem-history,AutoSponge/jekyller,codingnirvana/lambda-architecture-pres,NE05KY/vectorSide,iEgit/bfs-ru,freehaha/github-intro,piccolbo/jekyller,skade/presentations,jonalmeida/jekyller,shower/jekyller,jtanguy/time-talk,varya/scotlandjs-2015,jtanguy/nix-talk,jtanguy/time-talk,varya/empirejs-2015,vaidus/presentations,varya/jekyller-with-sc5,grvrulz/presentations,varya/wsd-2015,varya/wsd-2015,doochik/talk-moscow-spa-280215,Andrew8xx8/machine_learning_slides,xamgore/mvc,jtanguy/nix-talk,shower/jekyller,grvrulz/presentations