Remove Gamepad runtime flag (status=stable) for blink

Source/web/WebRuntimeFeatures.cpp

Index: Source/web/WebRuntimeFeatures.cpp
diff --git a/Source/web/WebRuntimeFeatures.cpp b/Source/web/WebRuntimeFeatures.cpp
index 3329954f3d186e58301a9c8ae1b3653507215976..6ce213d8556ea22d54d394c14f2598437691f069 100644
--- a/Source/web/WebRuntimeFeatures.cpp
+++ b/Source/web/WebRuntimeFeatures.cpp
@@ -112,11 +112,6 @@ void WebRuntimeFeatures::enableFileSystem(bool enable)
     RuntimeEnabledFeatures::setFileSystemEnabled(enable);
 }
 
-void WebRuntimeFeatures::enableGamepad(bool enable)
-{
-    RuntimeEnabledFeatures::setGamepadEnabled(enable);
-}
-
 void WebRuntimeFeatures::enableLocalStorage(bool enable)
 {
     RuntimeEnabledFeatures::setLocalStorageEnabled(enable);