Remove checkout functionality from GOM

Tools/GardeningServer/scripts/checkout.js

-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-var checkout = checkout || {};
-
-(function() {
-
-var g_haveSeenCheckoutAvailable = false;
-
-function checkoutAvailable()
-{
-    if (g_haveSeenCheckoutAvailable) {
-        return Promise.resolve();
-    }
-
-    return checkout.isAvailable().then(function(isAvailable) {
-        if (isAvailable) {
-            g_haveSeenCheckoutAvailable = true;
-            return;
-        }
-    });
-};
-
-checkout.isAvailable = function()
-{
-    return net.ajax({
-        url: '/ping',
-    }).then(function() { return true; },
-            function() { return false; });
-};
-
-checkout.lastBlinkRollRevision = function()
-{
-    return checkoutAvailable().then(function() {
-        return net.get('/lastroll');
-    });
-};
-
-checkout.rollout = function(revision, reason)
-{
-    return checkoutAvailable().then(function() {
-        return net.post('/rollout?' + $.param({
-            'revision': revision,
-            'reason': reason
-        }));
-    });
-};
-
-})();