Removes the currently stored draft.

@method removeDraft
function() {
			var self = this, storage = self.storage, key = self.key, content;

			if (storage) {
				// Get current contents and remove the existing draft
				content = storage.getItem(key);
				storage.removeItem(key);
				storage.removeItem(key + "_expires");

				// Dispatch remove event if we had any contents
				if (content) {
					self.onRemoveDraft.dispatch(self, {
						content : content
					});
				}
			}
		}