Remove event dispatcher

[diegoeis]

We will not use anymore the event dispatcher inside LocaStyle for now...
However, don't need to remove the file _event-dispatcher.js. Just remove the call to this script.

We need to remove the scripts that are using this dispatcher too.

• Remove links to docs event-dispatcher.html.erb (don't need the files, just remove the reference links of docs)
• Remove reference of dispatcher on docs of Modal: modal.html.erb
• Remove reference of dispatcher on docs of Collapse: collapse.html.erb
• Remove script using this dispachter: collapse_spec.js
• Remove/disable jasmine test event-dispatcher_spec.js

[palloi]

Waiting pull request of other modules.

[diegoeis]

I Think this can be closed. The another PR changing the events was approved.