get rid of unused assets, use gems instead

Gemfile

Gemfile.lock

app/assets/javascripts/application.js

app/assets/stylesheets/application.css

...or/assets/images/jquery-ui/ui-bg_flat_0_aaaaaa_40x100.png

...r/assets/images/jquery-ui/ui-bg_flat_75_ffffff_40x100.png

...r/assets/images/jquery-ui/ui-bg_glass_55_fbf9ee_1x400.png

...r/assets/images/jquery-ui/ui-bg_glass_65_ffffff_1x400.png

...r/assets/images/jquery-ui/ui-bg_glass_75_dadada_1x400.png

...r/assets/images/jquery-ui/ui-bg_glass_75_e6e6e6_1x400.png

...r/assets/images/jquery-ui/ui-bg_glass_95_fef1ec_1x400.png

...images/jquery-ui/ui-bg_highlight-soft_75_cccccc_1x100.png

vendor/assets/images/jquery-ui/ui-icons_222222_256x240.png

vendor/assets/images/jquery-ui/ui-icons_2e83ff_256x240.png

vendor/assets/images/jquery-ui/ui-icons_454545_256x240.png

vendor/assets/images/jquery-ui/ui-icons_888888_256x240.png

vendor/assets/images/jquery-ui/ui-icons_cd0a0a_256x240.png

vendor/assets/javascripts/bootstrap-modal.js

vendor/assets/javascripts/bootstrap-popover.js

vendor/assets/javascripts/jquery-ui.js