mac: remove old enable-fullscreen-toolbar-reveal switch

It's not used or referenced anywhere.

Bug: None
Change-Id: Ie3a7716023cc79a22f22980d9c90f9b0609a31be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2108621
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Leonard Grey <lgrey@chromium.org>
Reviewed-by: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751339}

chrome/common/chrome_switches.cc

@@ -747,10 +747,6 @@ const char kDisableHostedAppShimCreation[] = "disable-hosted-app-shim-creation";
 // Enable user metrics from within the installer.
 const char kEnableUserMetrics[] = "enable-user-metrics";
 
-// Enables the fullscreen toolbar to reveal itself for tab strip changes.
-const char kEnableFullscreenToolbarReveal[] =
-    "enable-fullscreen-toolbar-reveal";
-
 // Shows a notification when quitting Chrome with hosted apps running. Default
 // behavior is to also quit all hosted apps.
 const char kHostedAppQuitNotification[] = "enable-hosted-app-quit-notification";

chrome/common/chrome_switches.h

@@ -225,7 +225,6 @@ extern const char kWmClass[];
 #if defined(OS_MACOSX)
 extern const char kAppsKeepChromeAliveInTests[];
 extern const char kDisableHostedAppShimCreation[];
-extern const char kEnableFullscreenToolbarReveal[];
 extern const char kEnableUserMetrics[];
 extern const char kHostedAppQuitNotification[];
 extern const char kMetricsClientID[];