Removed commented stale code block

Author: liancheng

sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala

@@ -122,20 +122,4 @@ class SimpleTextRelation(
       }: _*)
     }
   }
-
-//  override def buildScan(
-//      requiredColumns: Array[String],
-//      filters: Array[Filter],
-//      inputPaths: Array[String]): RDD[Row] = {
-//    val fields = dataSchema.fields
-//    sparkContext.textFile(inputPaths.mkString(",")).map { record =>
-//      val valueMap = record.split(",").zip(fields).map {
-//        case (value, StructField(name, dataType, _, _)) =>
-//          name -> Cast(Literal(value), dataType).eval()
-//      }.toMap
-//
-//      // This mocks a simple projection
-//      Row.fromSeq(requiredColumns.map(valueMap).toSeq)
-//    }
-//  }
 }