Enable use_once_callback on mojom GN rule by default

device/bluetooth/public/interfaces/BUILD.gn

Index: device/bluetooth/public/interfaces/BUILD.gn
diff --git a/device/bluetooth/public/interfaces/BUILD.gn b/device/bluetooth/public/interfaces/BUILD.gn
index 7aa8a3b78e7540adad2ab469a5efdae65c5f1c45..5e7d9c7517ca20633ad1dc070f0032e12c7d29f0 100644
--- a/device/bluetooth/public/interfaces/BUILD.gn
+++ b/device/bluetooth/public/interfaces/BUILD.gn
@@ -14,8 +14,6 @@ mojom("fake_bluetooth_interfaces") {
   sources = [
     "test/fake_bluetooth.mojom",
   ]
-
-  use_once_callback = true
 }
 
 mojom("experimental_interfaces") {
@@ -33,6 +31,4 @@ mojom("experimental_interfaces") {
     "//chrome/browser:*",
     "//chrome/browser/ui:*",
   ]
-
-  use_once_callback = true
 }