Remove numTuples in Statistics for now.

Author: concretevitamin

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala

@@ -33,12 +33,6 @@ abstract class LogicalPlan extends QueryPlan[LogicalPlan] {
    * assign it a overriden version of `Statistics`.
    */
   case class Statistics(
-    /**
-     * Number of output tuples. For leaf operators this defaults to 1, otherwise it is set to the
-     * product of children's `numTuples`.
-     */
-    numTuples: Long = childrenStats.map(_.numTuples).product,
-
     /**
      * Physical size in bytes. For leaf operators this defaults to 1, otherwise it is set to the
      * product of children's `sizeInBytes`.