[dtd mode] Fix code that lacks side-effects
[dtd mode] Fix code that lacks side-effects

The 6 "n"s are reported as suspicious code by Closure Compiler.
They can just be empty statements instead.

pabloferz/CodeMirror,InternetGuru/CodeMirror,TDaglis/CodeMirror,dperetti/CodeMirror,ficristo/CodeMirror,mizchi/CodeMirror,InternetGuru/CodeMirror,rrandom/CodeMirror,hackmdio/CodeMirror,mizchi/CodeMirror,nightwing/CodeMirror,mtaran-google/CodeMirror,codio/CodeMirror,Dominator008/CodeMirror,jayaprabhakar/CodeMirror,mtaran-google/CodeMirror,notepadqq/CodeMirror,dperetti/CodeMirror,hackmdio/CodeMirror,bfrohs/CodeMirror,ficristo/CodeMirror,pabloferz/CodeMirror,vincentwoo/CodeMirror,schanzer/CodeMirror,kerabromsmu/CodeMirror,jayaprabhakar/CodeMirror,TDaglis/CodeMirror,rrandom/CodeMirror,vincentwoo/CodeMirror,MarcelGerber/CodeMirror,namin/CodeMirror,SidPresse/CodeMirror,bfrohs/CodeMirror,Jisuanke/CodeMirror,sourcelair/CodeMirror,MarcelGerber/CodeMirror,alur/CodeMirror,alur/CodeMirror,adobe/CodeMirror2,xeronith/CodeMirror,crazy4chrissi/CodeMirror,wingify/CodeMirror,Dominator008/CodeMirror,ejgallego/CodeMirror,pabloferz/CodeMirror,SidPresse/CodeMirror,Dominator008/CodeMirror,xeronith/CodeMirror,adobe/CodeMirror2,namin/CodeMirror,wingify/CodeMirror,INTELOGIE/CodeMirror,jkaplon/CodeMirror,ejgallego/CodeMirror,thomasjm/CodeMirror,sourcelair/CodeMirror,sourcelair/CodeMirror,rrandom/CodeMirror,mizchi/CodeMirror,codio/CodeMirror,jkaplon/CodeMirror,nightwing/CodeMirror,schanzer/CodeMirror,notepadqq/CodeMirror,kerabromsmu/CodeMirror,namin/CodeMirror,crazy4chrissi/CodeMirror,grzegorzmazur/CodeMirror,alur/CodeMirror,vincentwoo/CodeMirror,jkaplon/CodeMirror,MarcelGerber/CodeMirror,Jisuanke/CodeMirror,INTELOGIE/CodeMirror,nightwing/CodeMirror,thomasjm/CodeMirror,SidPresse/CodeMirror,Jisuanke/CodeMirror,crazy4chrissi/CodeMirror,hackmdio/CodeMirror,wingify/CodeMirror,codio/CodeMirror,InternetGuru/CodeMirror,thomasjm/CodeMirror,kerabromsmu/CodeMirror,mtaran-google/CodeMirror,notepadqq/CodeMirror,xeronith/CodeMirror,ficristo/CodeMirror,INTELOGIE/CodeMirror,TDaglis/CodeMirror,dperetti/CodeMirror,ejgallego/CodeMirror,grzegorzmazur/CodeMirror,adobe/CodeMirror2,jayaprabhakar/CodeMirror,grzegorzmazur/CodeMirror,bfrohs/CodeMirror,schanzer/CodeMirror