[committed] MIPS: microMIPS clean-ups

[Maciej W. Rozycki]

On Sat, 30 Jul 2011, Richard Sandiford wrote:

> > But leave it as it is.  It's my fault for not communicating clearly
> > enough, and most of the other hunks were bikeshed stuff.
> 
> Actually, the hunk I've reverted below was more than that.  The assert
> was originally added before some inline mask checks, but it doesn't make
> any sense now.

 Thanks for catching this.

  Maciej