Removing dead code
Removing dead code

srawlins/dart-markdown,meflyup/markdown,tomyeh/markd,tomyeh/markd,dart-lang/markdown,srawlins/dart-markdown,dpeek/dart-markdown,dart-lang/markdown,srawlins/dart-markdown,dart-lang/markdown,tomyeh/markd,meflyup/markdown,dpeek/dart-markdown