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-rw-r--r--lib/mkmf.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 6a4c3c8337..f0ece799da 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -132,7 +132,6 @@ module MakeMakefile
$mingw = /mingw/ =~ RUBY_PLATFORM
$cygwin = /cygwin/ =~ RUBY_PLATFORM
$netbsd = /netbsd/ =~ RUBY_PLATFORM
- $os2 = /os2/ =~ RUBY_PLATFORM
$beos = /beos/ =~ RUBY_PLATFORM
$haiku = /haiku/ =~ RUBY_PLATFORM
$solaris = /solaris/ =~ RUBY_PLATFORM