remove unnamed/unused js files

asset pre-compilation is failing on staging and
presumably would fail in production

first step is to remove all js files that are not used
so we can focus on those that are used that might be
causing the ruby-racer execjs JS_Parse_Error
`Name expected`

All javascripts files were copied into the
`old_javascripts` folder so that we don't lose them
ignore old js files dir in source control