Remove unnecessary type casts.

src/main/java/org/apache/commons/collections4/bloomfilter/hasher/DynamicHasher.java

@@ -115,7 +115,7 @@ public class DynamicHasher implements Hasher {
                     buffer++;
                 }
                 return (int) Math.floorMod(function.apply(buffers.get(buffer), funcCount++),
-                    (long) shape.getNumberOfBits());
+                    shape.getNumberOfBits());
             }
             throw new NoSuchElementException();
         }

src/test/java/org/apache/commons/collections4/IteratorUtilsTest.java

@@ -1410,7 +1410,7 @@ public class IteratorUtilsTest {
     @Test(expected = NullPointerException.class)
     public void testUnmodifiableMapIterator() {
         Set<?> set = new LinkedHashSet<>();
-        final MapIterator ie = (MapIterator) new EntrySetToMapIteratorAdapter(set);
+        final MapIterator ie = new EntrySetToMapIteratorAdapter(set);
         assertTrue("create instance fail", IteratorUtils.unmodifiableMapIterator(ie) instanceof MapIterator);
         IteratorUtils.unmodifiableMapIterator(null);
 

src/test/java/org/apache/commons/collections4/collection/AbstractCollectionTest.java

@@ -982,7 +982,7 @@ public abstract class AbstractCollectionTest<E> extends AbstractObjectTest {
         final int size = getCollection().size();
         final int targetCount = Collections.frequency(elements, target);
 
-        final Predicate<E> filter = e -> target.equals((E) e);
+        final Predicate<E> filter = e -> target.equals(e);
 
         assertTrue("Full collection removeIf should work", getCollection().removeIf(filter));
         getConfirmed().removeIf(filter);

src/test/java/org/apache/commons/collections4/map/Flat3MapTest.java

@@ -354,9 +354,9 @@ public class Flat3MapTest<K, V> extends AbstractIterableMapTest<K, V> {
         Map.Entry<K, V> mapEntry3 = it.next();
         it.remove();
         assertEquals(2, map.size());
-        assertEquals("one", map.get((K) "A"));
-        assertEquals("two", map.get((K) "B"));
-        assertEquals(null, map.get((K) "C"));
+        assertEquals("one", map.get("A"));
+        assertEquals("two", map.get("B"));
+        assertEquals(null, map.get("C"));
     }
 
     //-----------------------------------------------------------------------

src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java

@@ -688,8 +688,8 @@ public abstract class AbstractMultiValuedMapTest<K, V> extends AbstractObjectTes
         }
         assertEquals("{A=[X, Y, Z], B=[U, V, W]}", map.toString());
 
-        map.remove((K) "A");
-        map.remove((K) "B");
+        map.remove("A");
+        map.remove("B");
         assertEquals("{}", map.toString());
     }
 

src/test/java/org/apache/commons/collections4/multimap/UnmodifiableMultiValuedMapTest.java

@@ -104,7 +104,7 @@ public class UnmodifiableMultiValuedMapTest<K, V> extends AbstractMultiValuedMap
     public void testRemoveException() {
         final MultiValuedMap<K, V> map = makeFullMap();
         try {
-            map.remove((K) "one");
+            map.remove("one");
             fail();
         } catch (final UnsupportedOperationException e) {
             // expected, not support remove() method
@@ -116,7 +116,7 @@ public class UnmodifiableMultiValuedMapTest<K, V> extends AbstractMultiValuedMap
     public void testRemoveMappingException() {
         final MultiValuedMap<K, V> map = makeFullMap();
         try {
-            map.removeMapping((K) "one", (V) "uno");
+            map.removeMapping("one", "uno");
             fail();
         } catch (final UnsupportedOperationException e) {
             // expected, not support removeMapping() method

src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java

@@ -472,9 +472,9 @@ public abstract class AbstractMultiSetTest<T> extends AbstractCollectionTest<T>
         multiset.add((T) "A");
         final MultiSet.Entry<T> entry = multiset.entrySet().iterator().next();
         assertEquals(2, entry.getCount());
-        multiset.remove((T) "A");
+        multiset.remove("A");
         assertEquals(1, entry.getCount());
-        multiset.remove((T) "A");
+        multiset.remove("A");
         assertEquals(0, entry.getCount());
     }
 

src/test/java/org/apache/commons/collections4/multiset/UnmodifiableMultiSetTest.java

@@ -105,7 +105,7 @@ public class UnmodifiableMultiSetTest<E> extends AbstractMultiSetTest<E> {
         final MultiSet<E> multiset = makeFullCollection();
         final MultiSet<E> unmodifiableMultiSet =  UnmodifiableMultiSet.unmodifiableMultiSet(multiset);
         try {
-            unmodifiableMultiSet.remove( (E)"One",1);
+            unmodifiableMultiSet.remove( "One",1);
             fail();
         } catch (final UnsupportedOperationException ex) {}
     }