Remove unused installer::switches::kChromeSxS

Change-Id: I9296146970edc12caf4a89b425f0d86c9392ac37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2212311Reviewed-by: Greg Thompson <grt@chromium.org>
Commit-Queue: Brian Manthos <brianman@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#771430}

chrome/installer/util/util_constants.cc

@@ -14,9 +14,6 @@ namespace switches {
 // permissable.
 const char kAllowDowngrade[] = "allow-downgrade";
 
-// Run the installer for Chrome SxS.
-const char kChromeSxS[] = "chrome-sxs";
-
 // Create shortcuts for this user to point to a system-level install (which
 // must already be installed on the machine). The shortcuts created will
 // match the preferences of the already present system-level install as such

chrome/installer/util/util_constants.h

@@ -149,7 +149,6 @@ enum InstallerStage {
 namespace switches {
 
 extern const char kAllowDowngrade[];
-extern const char kChromeSxS[];
 extern const char kConfigureUserSettings[];
 extern const char kCriticalUpdateVersion[];
 extern const char kDeleteOldVersions[];