Moves require spec_helper to config file

spec/app/models/interesting_finding_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 describe WPScan::InterestingFinding do
   it_behaves_like WPScan::References do
     subject(:finding) { described_class.new('http://e.org/file.php', opts) }