* ext/bigdecimal/sample/nlsolve.rb: ditto.
* ext/bigdecimal/lib/bigdecimal/nlsolve.rb: removed because this file
is sample script and same file exists in ext/bigdecimal/sample.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7996 b2dd03c8-39d4-4d8f-98ff-823fe69b080e