Remove obsolete properties from root figure object. * graphics.in.h (root_figure::properties): Remove diary, diaryfile, echo, errormessage, format, formatspacing, and language from root object. * graphics.cc (get_diary, set_diary, get_diaryfile, set_diaryfile, get_echo, set_echo, get_errormessage, get_format, set_format, get_formatspacing, set_formatspacing, get_recursionlimit, set_recursionlimit): Remove functions for setting obsolete properties of root figure object.

((nil .
      ((c-file-style . "gnu")
       (indent-tabs-mode . nil)
       (fill-column . 72)
       (eval . (when (and (buffer-file-name)
                          (string-match-p "\\.h\\'" (buffer-file-name))
                          (not (string-match-p "/gnulib/" (buffer-file-name))))
                 (c++-mode)
                 (c-set-style "gnu")))))
 (change-log-mode . ((indent-tabs-mode . t)))
 (makefile-mode . ((indent-tabs-mode . t))))