Remove/Replace abandoned add-ons getting used in our repository.

[kushthedude]

Currently, There are many abandoned add-ons getting used in our app.

Some of which are causing trouble while reading the browser logs due to the depreciated usage of codes.

There are other alternatives easily available for such addons.
Some of the abandoned add-ons are : ember-g-map, ember-cli-geo

This need not be done immediately but will be a longterm benefit.

[mariobehling]

Thanks! A number of add-ons have been removed. If there are any specific add-ons left over, please open a dedicated issue.