[SYSTEMML-667] Remove js and css references from standalone LICENSE
[SYSTEMML-667] Remove js and css references from standalone LICENSE

Remove js and css references in standalone LICENSE.
Remove unused antlr version reference.

Closes #143.

gweidner/incubator-systemml,asurve/arvind-sysml2,dusenberrymw/systemml,apache/incubator-systemml,dusenberrymw/incubator-systemml,deroneriksson/incubator-systemml,asurve/systemml,gweidner/incubator-systemml,asurve/systemml,asurve/systemml,asurve/arvind-sysml2,gweidner/systemml,deroneriksson/systemml,gweidner/incubator-systemml,deroneriksson/systemml,nakul02/systemml,gweidner/systemml,niketanpansare/incubator-systemml,deroneriksson/incubator-systemml,asurve/incubator-systemml,nakul02/incubator-systemml,nakul02/systemml,akchinSTC/systemml,deroneriksson/systemml,asurve/incubator-systemml,dhutchis/systemml,iyounus/incubator-systemml,dusenberrymw/systemml,nakul02/systemml,gweidner/systemml,deroneriksson/systemml,iyounus/incubator-systemml,sandeep-n/incubator-systemml,gweidner/systemml,asurve/arvind-sysml2,apache/incubator-systemml,niketanpansare/systemml,nakul02/incubator-systemml,Wenpei/incubator-systemml,dusenberrymw/incubator-systemml,nakul02/systemml,sandeep-n/incubator-systemml,asurve/systemml,apache/incubator-systemml,apache/incubator-systemml,dhutchis/systemml,niketanpansare/incubator-systemml,niketanpansare/systemml,deroneriksson/systemml,deroneriksson/incubator-systemml,niketanpansare/incubator-systemml,asurve/arvind-sysml2,asurve/incubator-systemml,dhutchis/systemml,dusenberrymw/systemml,dhutchis/systemml,apache/incubator-systemml,deroneriksson/incubator-systemml,iyounus/incubator-systemml,nakul02/systemml,gweidner/systemml,nakul02/incubator-systemml,nakul02/incubator-systemml,apache/incubator-systemml,akchinSTC/systemml,asurve/incubator-systemml,sandeep-n/incubator-systemml,asurve/arvind-sysml2,Wenpei/incubator-systemml,fschueler/incubator-systemml,niketanpansare/incubator-systemml,deroneriksson/incubator-systemml,dusenberrymw/systemml,gweidner/incubator-systemml,asurve/arvind-sysml2,Wenpei/incubator-systemml,gweidner/incubator-systemml,dusenberrymw/incubator-systemml,fschueler/incubator-systemml,dusenberrymw/systemml,akchinSTC/systemml,asurve/systemml,dusenberrymw/incubator-systemml,dhutchis/systemml,sandeep-n/incubator-systemml,deroneriksson/incubator-systemml,iyounus/incubator-systemml,akchinSTC/systemml,niketanpansare/systemml,asurve/systemml,dusenberrymw/incubator-systemml,fschueler/incubator-systemml,niketanpansare/systemml,asurve/incubator-systemml,nakul02/systemml,Wenpei/incubator-systemml,gweidner/incubator-systemml,asurve/incubator-systemml,nakul02/incubator-systemml,deroneriksson/systemml,dusenberrymw/systemml,akchinSTC/systemml,nakul02/incubator-systemml,iyounus/incubator-systemml,akchinSTC/systemml,dhutchis/systemml,gweidner/systemml,dusenberrymw/incubator-systemml,niketanpansare/systemml,niketanpansare/systemml,iyounus/incubator-systemml,fschueler/incubator-systemml