Remove AppBanner runtime flag (status=stable)

third_party/WebKit/Source/modules/app_banner/AppBannerController.cpp

Index: third_party/WebKit/Source/modules/app_banner/AppBannerController.cpp
diff --git a/third_party/WebKit/Source/modules/app_banner/AppBannerController.cpp b/third_party/WebKit/Source/modules/app_banner/AppBannerController.cpp
index 88262955b222a01eb94ec054ccb79102cb212963..b33846cc57b5e10f6fde31820ad895411fe2f31b 100644
--- a/third_party/WebKit/Source/modules/app_banner/AppBannerController.cpp
+++ b/third_party/WebKit/Source/modules/app_banner/AppBannerController.cpp
@@ -9,7 +9,6 @@
 #include "core/frame/DOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/app_banner/BeforeInstallPromptEvent.h"
-#include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebVector.h"
 #include "public/platform/modules/app_banner/WebAppBannerClient.h"
 #include "public/platform/modules/app_banner/WebAppBannerPromptReply.h"
@@ -19,8 +18,6 @@ namespace blink {
 // static
 void AppBannerController::willShowInstallBannerPrompt(int requestId, WebAppBannerClient* client, LocalFrame* frame, const WebVector<WebString>& platforms, WebAppBannerPromptReply* reply)
 {
-    ASSERT(RuntimeEnabledFeatures::appBannerEnabled());
-
     Vector<String> wtfPlatforms;
     for (const WebString& platform : platforms)
         wtfPlatforms.append(platform);