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-rw-r--r--lib/tracer.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/lib/tracer.rb b/lib/tracer.rb
index 24a5313f4c..faafd803f4 100644
--- a/lib/tracer.rb
+++ b/lib/tracer.rb
@@ -2,7 +2,6 @@
#--
# $Release Version: 0.3$
# $Revision: 1.12 $
-require "thread"
##
# Outputs a source level execution trace of a Ruby program.