diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
index 3b72ef8c2f..a77f14a5b3 100755
--- a/tool/rbinstall.rb
+++ b/tool/rbinstall.rb
@@ -19,17 +19,10 @@ require 'optparse'
 require 'optparse/shellwords'
 require 'ostruct'
 require 'rubygems'
-require_relative 'vcs'
 
 STDOUT.sync = true
 File.umask(0)
 
-begin
-  $vcs = VCS.detect(File.expand_path('../..', __FILE__))
-rescue VCS::NotFoundError
-  $vcs = nil
-end
-
 def parse_args(argv = ARGV)
   $mantype = 'doc'
   $destdir = nil