fixed checkstyle issues

src/main/java/org/apache/commons/collections4/bloomfilter/Hasher.java

@@ -16,8 +16,6 @@
  */
 package org.apache.commons.collections4.bloomfilter;
 
-import java.util.function.IntPredicate;
-
 /**
  * A Hasher creates IndexProducer based on the hash implementation and the
  * provided Shape.

src/main/java/org/apache/commons/collections4/bloomfilter/IndexFilter.java

@@ -131,4 +131,4 @@ public final class IndexFilter implements IntPredicate {
             return retval;
         }
     }
-}
+}