Disallow row only containing a single col-*-12

[ChrisMBarr]

Something I see somewhat frequently from coworkers is something like:

<div class="row">
    <div class="col-md-12">
        <p>stuff here</p>
    </div>
</div>

Which has the exact same rendered output as

<p>stuff here</p>

Right now I have to manually hunt for col-*-12 grid classes and look for the ones that would be useless like in my first example. IMO, It would be a huge benefit to have a simple rule that looked for these useless grid implementations.