simplify revert return data

Author: cdetrio

lib/opFns.js

@@ -777,7 +777,7 @@ module.exports = {
     length = utils.bufferToInt(length)
 
     runState.stopped = true
-    runState.returnValue = runState.lastReturned = memLoad(runState, offset, length)
+    runState.returnValue = memLoad(runState, offset, length)
     trap(ERROR.REVERT)
   },
   // '0x70', range - other