chore(dependencies): remove requirejs
chore(dependencies): remove requirejs

It makes conflicts with the grunt-contrib-requirejs and is not used by
the plugins anymore.

TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,nagyistoce/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,jangalinski/camunda-bpm-webapp,jangalinski/camunda-bpm-webapp,nagyistoce/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,nagyistoce/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,jangalinski/camunda-bpm-webapp