Remove useless and deactivated for ages integration test

spec/integration/mutant/runner_spec.rb

@@ -1,26 +0,0 @@
-require 'spec_helper'
-
-describe Mutant, 'runner' do
-  before do
-    pending
-  end
-
-  around do |example|
-    Dir.chdir(TestApp.root) do
-      example.run
-    end
-  end
-
-  it 'allows to run mutant over a project' do
-    output = StringIO.new
-    runner = Mutant::Runner.run(
-      :killer => Mutant::Killer::Rspec,
-      :matcher => Mutant::Matcher::ObjectSpace.new(/\ATestApp::/),
-      :reporter => Mutant::Reporter::CLI.new(output)
-    )
-    runner.fail?.should be(true)
-    runner.errors.size.should be(22)
-    output.rewind
-    output.lines.grep(/Mutant alive:/).size.should be(22)
-  end
-end