view: removed multi component view ::size<T> (breaking changes)

src/entt/entity/view.hpp

@@ -334,19 +334,6 @@ public:
     /*! @brief Reverse iterator type. */
     using reverse_iterator = view_iterator<typename sparse_set<entity_type>::reverse_iterator>;
 
-    /**
-     * @brief Returns the number of existing components of the given type.
-     *
-     * This isn't the number of entities iterated by the view.
-     *
-     * @tparam Comp Type of component of which to return the size.
-     * @return Number of existing components of the given type.
-     */
-    template<typename Comp>
-    [[nodiscard]] size_type size() const ENTT_NOEXCEPT {
-        return std::get<pool_type<Comp> *>(pools)->size();
-    }
-
     /**
      * @brief Estimates the number of entities iterated by the view.
      * @return Estimated number of entities iterated by the view.

test/entt/entity/view.cpp

@@ -314,8 +314,6 @@ TEST(MultiComponentView, Functionalities) {
     ASSERT_NE(view.rbegin(), view.rend());
     ASSERT_NE(cview.rbegin(), cview.rend());
     ASSERT_EQ(view.size(), decltype(view.size()){1});
-    ASSERT_EQ(view.size<int>(), decltype(view.size()){1});
-    ASSERT_EQ(cview.size<const char>(), decltype(view.size()){2});
 
     registry.get<char>(e0) = '1';
     registry.get<char>(e1) = '2';