remove bower_components directory since it's now being ignored

bower_components/bootstrap-social/.bower.json

bower_components/bootstrap-social/.editorconfig

bower_components/bootstrap-social/.gitignore

bower_components/bootstrap-social/README.md

bower_components/bootstrap-social/bootstrap-social.css

bower_components/bootstrap-social/bootstrap-social.less

bower_components/bootstrap-social/bootstrap-social.scss

bower_components/bootstrap-social/bower.json

bower_components/bootstrap/.bower.json

bower_components/bootstrap/CHANGELOG.md

bower_components/bootstrap/Gemfile

bower_components/bootstrap/Gemfile.lock

bower_components/bootstrap/Gruntfile.js

bower_components/bootstrap/ISSUE_TEMPLATE.md

bower_components/bootstrap/LICENSE

bower_components/bootstrap/README.md

bower_components/bootstrap/bower.json

bower_components/bootstrap/dist/css/bootstrap-theme.css

bower_components/bootstrap/dist/css/bootstrap-theme.css.map

bower_components/bootstrap/dist/css/bootstrap-theme.min.css