Purge the App Launcher code from Windows.

chrome/installer/setup/install_worker.cc

Index: chrome/installer/setup/install_worker.cc
diff --git a/chrome/installer/setup/install_worker.cc b/chrome/installer/setup/install_worker.cc
index 68ac7554c1089c33ab6dd8d3ddc62e2a3255177a..3d10b4efd2fbbb8d65b4f8f2beb2c3debdf4c8e8 100644
--- a/chrome/installer/setup/install_worker.cc
+++ b/chrome/installer/setup/install_worker.cc
@@ -244,10 +244,8 @@ void AddProductSpecificWorkItems(const InstallationState& original_state,
 
 #if defined(GOOGLE_CHROME_BUILD)
       if (!InstallUtil::IsChromeSxSProcess()) {
-        // Add items to set up the App Launcher's version key if Google Chrome
-        // is being installed or updated.
-        AddAppLauncherVersionKeyWorkItems(installer_state.root_key(),
-            new_version, add_language_identifier, list);
+        // Remove the app launcher key as it has been deprecated.
+        RemoveAppLauncherVersionKey(installer_state.root_key());
       }
 #endif  // GOOGLE_CHROME_BUILD
       InstallUtil::AddUpdateDowngradeVersionItem(