Remove unnecessary lightbox files

theme/static/theme/lightbox2/CONTRIBUTING.md

theme/static/theme/lightbox2/Gruntfile.js

theme/static/theme/lightbox2/LICENSE

theme/static/theme/lightbox2/README.md

theme/static/theme/lightbox2/bower.json

theme/static/theme/lightbox2/dist/css/lightbox.css

theme/static/theme/lightbox2/dist/js/lightbox-plus-jquery.js

...tatic/theme/lightbox2/dist/js/lightbox-plus-jquery.min.js

...atic/theme/lightbox2/dist/js/lightbox-plus-jquery.min.map

theme/static/theme/lightbox2/dist/js/lightbox.js

theme/static/theme/lightbox2/dist/js/lightbox.min.map

theme/static/theme/lightbox2/examples/index.html

theme/static/theme/lightbox2/package.json

theme/static/theme/lightbox2/src/css/lightbox.css

theme/static/theme/lightbox2/src/images/close.png

theme/static/theme/lightbox2/src/images/loading.gif

theme/static/theme/lightbox2/src/images/next.png

theme/static/theme/lightbox2/src/images/prev.png

theme/static/theme/lightbox2/src/js/lightbox.js

theme/templates/partials/base.html.nunj