Revert "Adding TryDequeue method to Queue. resolves #4316"

This reverts commit d19afae.

Author: alphonsekurian

src/System.Collections/src/System/Collections/Generic/Queue.cs

@@ -240,40 +240,16 @@ IEnumerator IEnumerable.GetEnumerator()
         // InvalidOperationException.
         /// <include file='doc\Queue.uex' path='docs/doc[@for="Queue.Dequeue"]/*' />
         public T Dequeue()
-        {
-            T removed;
-            if (!TryDequeue(out removed))
-                throw new InvalidOperationException(SR.InvalidOperation_EmptyQueue);
-
-            return removed;
-        }
-
-        /// <summary>
-        /// Attempts to remove and return the object at the beginning of the <see cref="Queue{T}"/>.
-        /// </summary>
-        /// <param name="item">
-        /// When this method returns, if the operation was successful, <paramref name="item"/> contains the
-        /// object removed. If no object was available to be removed, the value is unspecified.
-        /// </param>
-        /// <returns>
-        /// true if an element was removed and returned from the beginning of the <see cref="Queue{T}"/>
-        /// successfully; otherwise, false.
-        /// </returns>
-        /// <include file='doc\Queue.uex' path='docs/doc[@for="Queue.TryDequeue"]/*' />
-        public bool TryDequeue(out T item)
         {
             if (_size == 0)
-            {
-                item = default(T);
-                return false;
-            }
+                throw new InvalidOperationException(SR.InvalidOperation_EmptyQueue);
 
-            item = _array[_head];
+            T removed = _array[_head];
             _array[_head] = default(T);
             MoveNext(ref _head);
             _size--;
             _version++;
-            return true;
+            return removed;
         }
 
         // Returns the object at the head of the queue. The object remains in the
@@ -443,6 +419,7 @@ public bool MoveNext()
 
                     arrayIndex -= capacity; // wrap around if needed
                 }
+                
                 _currentElement = array[arrayIndex];
                 return true;
             }