Oilpan: Remove unused swap methods for on-heap collections

Source/platform/heap/HeapAllocator.h

Index: Source/platform/heap/HeapAllocator.h
diff --git a/Source/platform/heap/HeapAllocator.h b/Source/platform/heap/HeapAllocator.h
index b328dbdc593ca4ae56e561fbd74c8143c0252dd9..4aeb623542c263ea2e04b13dad4d92ca27785a5e 100644
--- a/Source/platform/heap/HeapAllocator.h
+++ b/Source/platform/heap/HeapAllocator.h
@@ -431,21 +431,6 @@ public:
     }
 };
 
-template<typename T, size_t i>
-inline void swap(HeapVector<T, i>& a, HeapVector<T, i>& b) { a.swap(b); }
-template<typename T, size_t i>
-inline void swap(HeapDeque<T, i>& a, HeapDeque<T, i>& b) { a.swap(b); }
-template<typename T, typename U, typename V>
-inline void swap(HeapHashSet<T, U, V>& a, HeapHashSet<T, U, V>& b) { a.swap(b); }
-template<typename T, typename U, typename V, typename W, typename X>
-inline void swap(HeapHashMap<T, U, V, W, X>& a, HeapHashMap<T, U, V, W, X>& b) { a.swap(b); }
-template<typename T, size_t i, typename U>
-inline void swap(HeapListHashSet<T, i, U>& a, HeapListHashSet<T, i, U>& b) { a.swap(b); }
-template<typename T, typename U, typename V>
-inline void swap(HeapLinkedHashSet<T, U, V>& a, HeapLinkedHashSet<T, U, V>& b) { a.swap(b); }
-template<typename T, typename U, typename V>
-inline void swap(HeapHashCountedSet<T, U, V>& a, HeapHashCountedSet<T, U, V>& b) { a.swap(b); }
-
 } // namespace blink
 
 #endif