📝 remove HEDLEY annotation from documentation

doc/Makefile

@@ -61,6 +61,8 @@ doxygen: create_output create_links
 	$(SED) -i 's@template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer>@@g' html/*.html
 	$(SED) -i 's@< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer >@@g' html/*.html
 	$(SED) -i 's@< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer >@@g' html/*.html
+	$(SED) -i 's@JSON_HEDLEY_RETURNS_NON_NULL@@g' html/*.html
+	$(SED) -i 's@JSON_HEDLEY_WARN_UNUSED_RESULT@@g' html/*.html
 
 upload: clean doxygen check_output
 	scripts/git-update-ghpages nlohmann/json html