[COLLECTIONS-543] Do not override equals and hashCode for abstract co…

…llections.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1671833 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMap.java

@@ -600,42 +600,6 @@ public <T> T[] toArray(T[] a) {
             return col.toArray(a);
         }
 
-        @Override
-        public boolean equals(Object other) {
-            final Collection<V> col = getMapping();
-            if (col == null) {
-                return CollectionUtils.EMPTY_COLLECTION.equals(other);
-            }
-            if (other == null) {
-                return false;
-            }
-            if(!(other instanceof Collection)){
-                return false;
-            }
-            Collection<?> otherCol = (Collection<?>) other;
-            if (CollectionUtils.isEqualCollection(col, otherCol) == false) {
-                return false;
-            }
-            return true;
-        }
-
-        @Override
-        public int hashCode() {
-            final Collection<V> col = getMapping();
-            if (col == null) {
-                return CollectionUtils.EMPTY_COLLECTION.hashCode();
-            }
-            int h = 0;
-            Iterator<V> it = col.iterator();
-            while (it.hasNext()) {
-                V val = it.next();
-                if (val != null) {
-                    h += val.hashCode();
-                }
-            }
-            return h;
-        }
-
         @Override
         public String toString() {
             final Collection<V> col = getMapping();