Remove unused markdown dep
Remove unused markdown dep

transformers support using marked.

VANITAX/jade,pugjs/jade,pugjs/then-jade,magicdawn/jade,omixen/jade,bogus34/jade-vfs,andreytkachenko/jade,ceremcem/jade,colin-h/jade,omixen/jade,webskyer/jade,Laoujin/jade,ilovezy/jade,Shinchy/jade,pugjs/jade,mrotaru/jade,cgvarela/jade,webmasteraxe/jade,pugjs/then-jade,angryrobot/jade,muthhus/jade,ilovezy/jade,martindale/jade,jirengu/jade,webskyer/jade,jjz/jade,tranhieutt/jade,Mitrend/jade,mrotaru/jade,harp/jade,jadejs/then-jade,gdibble/jade,colin-h/jade,magicdawn/jade,fredyteheranto/jade,pugjs/pug,rajnishyadav321/jade,cutsin/jade,jodytate/jade,gexiaowei/jade,mumaoxi/jade,illusionfield/jade,angrilove/jade,webmasteraxe/jade,VeraWei/jade,angrilove/jade,ridixcr/jade,bogus34/jade-vfs,Mitrend/jade,jadejs/then-jade,coderhaoxin/jade,tranhieutt/jade,pugjs/pug,andreytkachenko/jade,fredyteheranto/jade,hnag409/jade,ridixcr/jade,cutsin/jade,jodytate/jade,Shinchy/jade,Laoujin/jade,VANITAX/jade,martindale/jade,illusionfield/jade,coderhaoxin/jade,Victorgichohi/jade,modulexcite/jade,gexiaowei/jade,cgvarela/jade,mumaoxi/jade,rajnishyadav321/jade,jjz/jade,harp/jade,Victorgichohi/jade,hnag409/jade,cesarmarinhorj/jade,modulexcite/jade,cesarmarinhorj/jade,muthhus/jade,gdibble/jade,jirengu/jade,VeraWei/jade,angryrobot/jade