revert test -0.0 equality for complex types

Author: tanelk

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

@@ -22,7 +22,7 @@ import java.sql.{Date, Timestamp}
 import scala.collection.immutable.HashSet
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.{RandomDataGenerator, Row}
+import org.apache.spark.sql.RandomDataGenerator
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.encoders.ExamplePointUDT