关闭Ruby 2.1不推荐使用RUBY_HEAP_MIN_SLOTS警告

我的一些GC设置.bash_profile:

export RUBY_HEAP_MIN_SLOTS=1250000
export RUBY_HEAP_SLOTS_INCREMENT=100000
export RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
export RUBY_GC_MALLOC_LIMIT=30000000
export RUBY_HEAP_FREE_MIN=12500

当我使用Ruby 2.1时,它抱怨RUBY_HEAP_MIN_SLOTS:

/.rvm/rubies/ruby-2.1.0/bin/ruby: warning: RUBY_HEAP_MIN_SLOTS is obsolete. Use RUBY_GC_HEAP_INIT_SLOTS instead.

我迁移到了RUBY_GC_HEAP_INIT_SLOTS,但这个警告仍然显示出来.有谁知道如何关闭它？我错过了什么吗？谢谢.