remove dup test in rebase

Author: adrian-wang

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

@@ -304,19 +304,6 @@ class DateExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
       NextDay(Literal(Date.valueOf("2015-07-23")), Literal.create(null, StringType)), null)
   }
 
-  test("datetime function current_date") {
-    val d0 = DateTimeUtils.millisToDays(System.currentTimeMillis())
-    val cd = CurrentDate().eval(EmptyRow).asInstanceOf[Int]
-    val d1 = DateTimeUtils.millisToDays(System.currentTimeMillis())
-    assert(d0 <= cd && cd <= d1 && d1 - d0 <= 1)
-  }
-
-  test("datetime function current_timestamp") {
-    val ct = DateTimeUtils.toJavaTimestamp(CurrentTimestamp().eval(EmptyRow).asInstanceOf[Long])
-    val t1 = System.currentTimeMillis()
-    assert(math.abs(t1 - ct.getTime) < 5000)
-  }
-
   test("function to_date") {
     checkEvaluation(
       ToDate(Literal(Date.valueOf("2015-07-22"))),