Removed twisted tests

Why does only Process.daemon have these tests?

spec/ruby/core/process/daemon_spec.rb

@@ -86,10 +86,6 @@ platform_is_not :windows do
       @daemon.invoke("stay_in_dir", [true]).should == @invoke_dir
     end
 
-    it "does not change to the root directory if the first argument is non-false" do
-      @daemon.invoke("stay_in_dir", [:yes]).should == @invoke_dir
-    end
-
     describe "when the second argument is not given" do
       it_behaves_like :process_daemon_keep_stdio_open_false, nil, [false]
     end
@@ -105,10 +101,6 @@ platform_is_not :windows do
     describe "when the second argument is true" do
       it_behaves_like :process_daemon_keep_stdio_open_true, nil, [false, true]
     end
-
-    describe "when the second argument is non-false" do
-      it_behaves_like :process_daemon_keep_stdio_open_true, nil, [false, :yes]
-    end
   end
 end