Remove unused demo html file
Remove unused demo html file

yuvalsaraf/react-cordova-boilerplate,yuvalsaraf/react-cordova-boilerplate,unimonkiez/react-cordova-boilerplate,unimonkiez/react-cordova-boilerplate,gitsad/react-cordova-boilerplate,yuvalsaraf/react-cordova-boilerplate,gitsad/react-cordova-boilerplate,unimonkiez/react-cordova-boilerplate,gitsad/react-cordova-boilerplate