Remove unnecessary stubbing in specs

Since the specs for the type do not use any provider features we do
not have to create a fake provider.

spec/unit/type/rpmkey_spec.rb

@@ -4,12 +4,6 @@ require 'spec_helper'
 
 describe Puppet::Type.type(:rpmkey) do
 
-  before :each do
-    @provider_class = described_class.provide(:fake) { mk_resource_methods }
-    @provider_class.stubs(:suitable?).returns true
-    described_class.stubs(:defaultprovider).returns @provider_class
-  end
-
   it "should have :name as its keyattribute" do
     described_class.key_attributes.should == [:name]
   end