Remove unused Tree methods
Remove unused Tree methods

ember-cli/broccoli,gabesoft/broccoli,gabesoft/broccoli,broccolijs/broccoli,broccolijs/broccoli,ixisystems/broccoli,osxi/broccoli,gabesoft/broccoli,osxi/broccoli,ember-cli/broccoli,ixisystems/broccoli,broccolijs/broccoli,ember-cli/broccoli,broccolijs/broccoli,osxi/broccoli,rwjblue/broccoli