Get rid of NASTI memory interconnects

These were made for a previous Hurricane tapeout, but we are now doing
all of the memory routing in TileLink, so they are no longer needed.

src/main/scala/unittest/Configs.scala

@@ -12,7 +12,6 @@ class WithJunctionsUnitTests extends Config(
     case rocket.XLen => 64
     case UnitTests => (p: Parameters) => Seq(
       Module(new junctions.MultiWidthFifoTest),
-      Module(new junctions.NastiMemoryDemuxTest()(p)),
       Module(new junctions.HastiTest()(p)))
     case _ => throw new CDEMatchError
   })