Remove systemInfo sample since it was landed to chrome-app-samples on github

chrome/common/extensions/docs/examples/api/systemInfo/main.js

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-var systemInfo = chrome.experimental.systemInfo;
-
-var indicator = {}
-var isStarted = false;
-
-function onStorageChanged(info) {
-  var elem = document.getElementById(info.id);
-  if (indicator[info.id]++ % 2)
-    elem.bgColor = "green";
-  else
-    elem.bgColor = "white";
-  elem.innerHTML = info.availableCapacity;
-}
-
-function startMonitor() {
-  if (isStarted) return;
-  systemInfo.storage.onAvailableCapacityChanged.addListener(onStorageChanged);
-  isStarted = true;
-}
-
-function stopMonitor() {
-  if (!isStarted) return;
-  systemInfo.storage.onAvailableCapacityChanged.removeListener(
-      onStorageChanged);
-  isStarted = false;
-}
-
-function showStorageInfo(unit) {
-  table = "<tr><td>" + unit.id + "</td>" +
-    "<td>" + unit.type + "</td>" +
-    "<td>" + Math.round(unit.capacity/1024) + "</td>" +
-    "<td id=" + "\"" + unit.id + "\">" +
-    Math.round(unit.availableCapacity/1024) +
-    "</td></tr>\n";
-  return table;
-}
-
-function init() {
-  document.getElementById("start-btn").onclick = startMonitor;
-  document.getElementById("stop-btn").onclick = stopMonitor;
-
-  // Get CPU information.
-  chrome.experimental.systemInfo.cpu.get(function(cpu) {
-    var cpuInfo = "<b>Architecture:</b> " + cpu.archName +
-      "<br><b>Model Name: </b>" + cpu.modelName +
-      "<br><b>Number of Processors: </b>" + cpu.numOfProcessors;
-    var div = document.getElementById("cpu-info");
-    div.innerHTML = cpuInfo;
-  });
-  chrome.experimental.systemInfo.cpu.onUpdated.addListener(function(info) {
-    var table = "<br><table border=\"1\">\n" +
-      "<tr><td width=\"80px\"><b>Index</b></td>";
-    for (var i = 0; i < info.usagePerProcessor.length; i++) {
-      table += "<td width=\"120px\"><b>" + i + "</b></td>";
-    }
-    table += "<td width=\"120px\"><b>Total</b></td></tr>\n";
-    table += "<tr><td><b>History Usage</b></td>";
-    for (var i = 0; i < info.usagePerProcessor.length; i++) {
-      table += "<td>" + Math.round(info.usagePerProcessor[i]) + "</td>";
-    }
-    table += "<td>" + Math.round(info.averageUsage) + "</td></tr>";
-    table += "</table>\n";
-    var div = document.getElementById("cpu-cores");
-    div.innerHTML = table;
-  });
-
-  // Get memory information.
-  chrome.experimental.systemInfo.memory.get(function(memory) {
-    var memoryInfo =
-    "<b>Total Capacity:</b> " + Math.round(memory.capacity / 1024) + "KB" +
-    "<br><b>Available Capacity: </b>" +
-    Math.round(memory.availableCapacity / 1024) + "KB"
-    var div = document.getElementById("memory-info");
-    div.innerHTML = memoryInfo;
-  });
-
-  // Get storage information.
-  chrome.experimental.systemInfo.storage.get(function(units) {
-    var table = "<table width=65% border=\"1\">\n" +
-      "<tr><td><b>ID</b></td>" +
-      "<td><b>Type</b></td>" +
-      "<td><b>Total Capacity (KB)</b></td>" +
-      "<td><b>Available Capacity (KB)</b></td>" +
-      "</tr>\n";
-    for (var i = 0; i < units.length; i++) {
-      indicator[units[i].id] = 0;
-      table += showStorageInfo(units[i]);
-    }
-    table += "</table>\n";
-    var div = document.getElementById("storage-list");
-    div.innerHTML = table;
-  });
-}
-
-document.addEventListener('DOMContentLoaded', init);