Remove missing old spec

Author: dfop02

bundler/spec/bundler/plugin_spec.rb

@@ -129,14 +129,6 @@
       subject.gemfile_install(gemfile)
     end
 
-    it "doesn't calls installer when plugins already installed" do
-      allow(index).to receive(:installed?).and_return(true)
-      allow(definition).to receive(:dependencies) { [Bundler::Dependency.new("new-plugin", ">=0")] }
-      allow(installer).to receive(:install_definition).never
-
-      subject.gemfile_install(gemfile)
-    end
-
     context "with dependencies" do
       let(:plugin_specs) do
         {