Revert CVE-2013-4164 test

This reverts commit 7688211009.

spec/spec_helper.rb

@@ -1,15 +1,4 @@
 # -*- coding:binary -*-
-
-# Test Ruby for CVE-2013-4164
-# See https://www.ruby-lang.org/en/news/2013/11/22/heap-overflow-in-floating-point-parsing-cve-2013-4164/
-$cve_2013_4164_tested ||= false
-unless $cve_2013_4164_tested
-  $stdout.puts "\n[*] Testing for CVE-2013-4164. If this crashes, update your Ruby version.\n"
-  10.times { ("1."+"1"*300000).to_f }
-  $cve_2013_4164_tested = true
-  $stdout.puts "[*] Success, Ruby survived the segfaulting test."
-end
-
 require 'rubygems'
 require 'bundler'
 Bundler.require(:default, :test, :db)