remove obsolete rb_gc_finalize_deferred().
rb_gc_finalize_deferred() is remained for compatibility with C-extensions. However, this function is no longer working from Ruby 2.4 (crash with SEGV immediately). So remove it completely.
remove obsolete rb_gc_finalize_deferred().
rb_gc_finalize_deferred() is remained for compatibility with
C-extensions. However, this function is no longer working
from Ruby 2.4 (crash with SEGV immediately).
So remove it completely.