Remove some dead app host code.

chrome/installer/util/util_constants.cc

Index: chrome/installer/util/util_constants.cc
diff --git a/chrome/installer/util/util_constants.cc b/chrome/installer/util/util_constants.cc
index 8800c5c461043e657d5de335bcb39c225424b513..67df18e4c4a026f6138eb8c3b5caae6a41237052 100644
--- a/chrome/installer/util/util_constants.cc
+++ b/chrome/installer/util/util_constants.cc
@@ -212,6 +212,7 @@ const char kOutputFile[] = "output-file";
 // TODO(gab): Rename setup.exe itself altogether and use the same binary for
 // Active Setup.
 const wchar_t kActiveSetupExe[] = L"chrmstp.exe";
+const wchar_t kAppLauncherGuid[] = L"{FDA71E6F-AC4C-4a00-8B70-9958A68906BF}";
 const wchar_t kChromeAppHostExe[] = L"app_host.exe";
 const wchar_t kChromeDll[] = L"chrome.dll";
 const wchar_t kChromeChildDll[] = L"chrome_child.dll";