backport security fixes PR so we can create a 5.0.2 release

Author: jmalkin

src/main/java/org/apache/datasketches/quantiles/ItemsSketch.java

@@ -682,7 +682,7 @@ ItemsSketchSortedView<T> getSV() {
       }
 
       return new ItemsSketchSortedView(
-          quantiles, cumWeights, getN(), comparator, getMaxItem(), getMinItem(), getK());
+          quantiles, cumWeights, getN(), comparator, getMaxItem(), getMinItem());
     }
 
   }

src/main/java/org/apache/datasketches/quantiles/ItemsSketchSortedView.java

@@ -28,7 +28,6 @@
 import java.lang.reflect.Array;
 import java.util.Comparator;
 
-import org.apache.datasketches.common.SketchesArgumentException;
 import org.apache.datasketches.quantilescommon.GenericInequalitySearch.Inequality;
 import org.apache.datasketches.quantilescommon.GenericPartitionBoundaries;
 import org.apache.datasketches.quantilescommon.GenericSortedView;