Roll-back to hard-coded object_t::value_type

include/nlohmann/json.hpp

@@ -496,12 +496,8 @@ class basic_json
     using object_t = ObjectType<StringType,
           basic_json,
           object_comparator_t,
-          // Note the use of std::map default allocator as a placeholder
-          // to extract the actual ObjectType::value_type
-          AllocatorType<typename
-          ObjectType<StringType, basic_json, object_comparator_t,
-          std::allocator<std::pair<const StringType, basic_json>>
-          >::value_type>>;
+          // Note: this forces object_t::value_type to match std::map's
+          AllocatorType<std::pair<const StringType, basic_json>>>;
 
     /*!
     @brief a type for an array

single_include/nlohmann/json.hpp

@@ -16355,12 +16355,8 @@ class basic_json
     using object_t = ObjectType<StringType,
           basic_json,
           object_comparator_t,
-          // Note the use of std::map default allocator as a placeholder
-          // to extract the actual ObjectType::value_type
-          AllocatorType<typename
-          ObjectType<StringType, basic_json, object_comparator_t,
-          std::allocator<std::pair<const StringType, basic_json>>
-          >::value_type>>;
+          // Note: this forces object_t::value_type to match std::map's
+          AllocatorType<std::pair<const StringType, basic_json>>>;
 
     /*!
     @brief a type for an array