removed base16-related code

src/services/style_setter/style_setter.js

static/css/base16-3024.css

static/css/base16-apathy.css

static/css/base16-ashes.css

static/css/base16-atelier-cave.css

static/css/base16-atelier-dune.css

static/css/base16-atelier-estuary.css

static/css/base16-atelier-forest.css

static/css/base16-atelier-heath.css

static/css/base16-atelier-lakeside.css

static/css/base16-atelier-plateau.css

static/css/base16-atelier-savanna.css

static/css/base16-atelier-seaside.css

static/css/base16-atelier-sulphurpool.css

static/css/base16-bespin.css

static/css/base16-brewer.css

static/css/base16-bright.css

static/css/base16-chalk.css

static/css/base16-codeschool.css

static/css/base16-darktooth.css