如何从gem远程源中删除远程源

Žel*_*pin 21 ruby gem rubygems

我已将gemcutter.org添加到我的Rubygems源代码中,现在我不知道如何删除它.

$ gem sources
*** CURRENT SOURCES ***

http://gemcutter.org
http://gems.rubyforge.org/
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Žel*_*pin 46

$ gem sources -r http://gemcutter.org
http://gemcutter.org removed from sources

$ gem sources
*** CURRENT SOURCES ***

http://gems.rubyforge.org/
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