[rubygems/rubygems] Remove broken test

It turns out that this test is checking essentially nothing useful. The
paperclip gem doesn't exist in our setup, so initial install is failing
and the test is only checking that calling `bundle check` 3 times on a
broken setup always returns the same thing.

I went to the history of this test:

* rubygems/bundler@105654a
* rubygems/bundler@ae53be1
* rubygems/bundler@d19f4a7
* rubygems/bundler@092f169
* rubygems/bundler@3687843

And have finally decided to remove it since I'm not sure changing it to
something else will lead to testing something useful and not already
tested.

rubygems/rubygems@6184322967

spec/bundler/commands/check_spec.rb

@@ -210,21 +210,6 @@
     expect(err).not_to include("Unfortunately, a fatal error has occurred. ")
   end
 
-  it "should not crash when called multiple times on a new machine" do
-    gemfile <<-G
-      gem 'rails', '3.0.0.beta3'
-      gem 'paperclip', :git => 'git://github.com/thoughtbot/paperclip.git'
-    G
-
-    simulate_new_machine
-    bundle "check"
-    last_out = out
-    3.times do
-      bundle :check
-      expect(out).to eq(last_out)
-    end
-  end
-
   it "fails when there's no lock file and frozen is set" do
     install_gemfile! <<-G
       source "#{file_uri_for(gem_repo1)}"