Disabling Assetic Controller

I've gotten a few requests to do this on various projects, so I thought it's time we start the conversation on whether to use this or not.
The assetic controller is what allows assets included through the `{% stylesheets %}` and `{% javascripts %}` tags without first dumping the assets in development mode.
Removing this configuration will allow for faster page loads in development mode as the assets will not be running through symfony.
The downside of this change is that projects' assets will have to be manually dumped during changes with the `app/console assetic:dump` command but can be continuously monitored and dumped by adding `--watch`
Running the assets through the controllers has proven to be quite slow for people without local environments or slow hard disks.
I've been somewhat hesitant to disable any features that come from the upstream SE, but this issue has seemed to come up with other developers enough that I want to start the conversation.

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Removed the overrides to use the assetic controller in development and
staging environments