hide_labels_in_story_lists.user.js

// ==UserScript==
// @name        Hide labels in story lists
// @namespace   http://shiftcommathree.com
// @description Hides the small green labels before each story title
// @include     http://www.pivotaltracker.com/projects/*
// @include     http://pivotaltracker.com/projects/*
// @author      Chris Kampmeier
// ==/UserScript==

function addGlobalStyle(css) {
  var head, style;
  head = document.getElementsByTagName('head')[0];
  if (!head) { return; }
  style = document.createElement('style');
  style.type = 'text/css';
  style.innerHTML = css;
  head.appendChild(style);
}

addGlobalStyle(
'div.storyPreviewHeader span.storyLabels {' +
'  display: none ! important;' +
'}');