message: fire: removing usused functions
  It seems these functions are not required any more. The code was added in commit to fix issue There are still regression tests for so when this commit passes the CI, the functions may be removed for good.
diff: @@ -4240,74 +4240,6 @@ class basic_json
  with range checking
  @sa @ref value() for access by value with a default value
  - @since version 1.0.0
  - */
  - template<typename T, std::size_t n>
  - reference operator[](T * (&key)[n])
  - {
  - return operator[](static_cast<const T>(key));
  - }
  -
  - /*!
  - @brief read-only access specified object element
  -
  - Returns a const reference to the element at with specified key @a key. No
  - bounds checking is performed.
  -
  - @warning If the element with key @a key does not exist, the behavior is
  - undefined.
  -
  - @note This function is required for compatibility reasons with Clang.
  -
  - @param[in] key key of the element to access
  -
  - @return const reference to the element at key @a key
  -
  - @throw type_error.305 if the JSON value is not an object; in that cases,
  - using the [] operator with a key makes no sense.
  -
  - @complexity Logarithmic in the size of the container.
  -
  - @liveexample{The example below shows how object elements can be read using
  - the `[]` operator.,operatorarray__key_type_const}
  -
  - @sa @ref at(const typename object_t::key_type&) for access by reference
  - with range checking
  - @sa @ref value() for access by value with a default value
  -
  - @since version 1.0.0
  - */
  - template<typename T, std::size_t n>
  - const_reference operator[](T * (&key)[n]) const
  - {
  - return operator[](static_cast<const T>(key));
  - }
  -
  - /*!
  - @brief access specified object element
  -
  - Returns a reference to the element at with specified key @a key.
  -
  - @note If @a key is not found in the object, then it is silently added to
  - the object and filled with a `null` value to make `key` a valid reference.
  - In case the value was `null` before, it is converted to an object.
  -
  - @param[in] key key of the element to access
  -
  - @return reference to the element at key @a key
  -
  - @throw type_error.305 if the JSON value is not an object or null; in that
  - cases, using the [] operator with a key makes no sense.
  -
  - @complexity Logarithmic in the size of the container.
  -
  - @liveexample{The example below shows how object elements can be read and
  - written using the `[]` operator.,operatorarray__key_type}
  -
  - @sa @ref at(const typename object_t::key_type&) for access by reference
  - with range checking
  - @sa @ref value() for access by value with a default value
  -
  @since version 1.1.0
  */
  template<typename T>
  