Remove unnecessary old tests.

Author: viirya

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala

@@ -196,15 +196,6 @@ class MathFunctionsSuite extends SparkFunSuite with ExpressionEvalHelper {
     testUnary(Sqrt, math.sqrt, (0 to 20).map(_ * 0.1))
     testUnary(Sqrt, math.sqrt, (-5 to -1).map(_ * 1.0), expectNull = true)
 
-    val inputSequence = Seq(4.5, 10.10, 20.55, 36.0, 57.0, 61.7, 77.0, 81.0, 98.9)
-    val expectedResults = inputSequence.map(l => math.sqrt(l))
-    val rowSequence = inputSequence.map(l => create_row(l))
-    val d = 'a.double.at(0)
-
-    for ((row, expected) <- rowSequence zip expectedResults) {
-      checkEvaluation(Sqrt(d), expected, row)
-    }
-
     checkEvaluation(Sqrt(Literal.create(null, DoubleType)), null, create_row(null))
     checkEvaluation(Sqrt(Literal(-1.0)), null, EmptyRow)
     checkEvaluation(Sqrt(Literal(-1.5)), null, EmptyRow)