Remove unnecessary maths

@danrye - we cleaned up the indentation and removed all of the modulo stuff which was unnecessary. The bootstrap classes handle breaking the content into columns in the correct way. Please let us know if there's something we're missing.
Looking at this, it seems just a simple clearfix will do here.  No need for the conditional since it's visible at all sizes.
@janders223 add the clearfix back in, keep out the modulus and I think we're good to go with this.