message: Remove reference to Rifling tech
diff: @@ -865,7 +865,6 @@ class RFCUtils:
  def colonialConquest(self, iCiv, tPlot):
  x, y = tPlot
  - bRifling = gc.getTeam(iCiv).isHasTech(iRifling)
  iTargetCiv = gc.getMap().plot(x, y).getPlotCity().getOwner()
  lFreePlots = []
  