Mojo: Simplify typemap usage.

third_party/WebKit/public/BUILD.gn

Index: third_party/WebKit/public/BUILD.gn
diff --git a/third_party/WebKit/public/BUILD.gn b/third_party/WebKit/public/BUILD.gn
index 2a342968ee7d008590e1ac7311a6c23212049dda..3b154e49914ac4e195eb58efda3c5245b914006d 100644
--- a/third_party/WebKit/public/BUILD.gn
+++ b/third_party/WebKit/public/BUILD.gn
@@ -175,20 +175,6 @@ grit("image_resources") {
   ]
 }
 
-# GYP version: WebKit/public/blink.gyp:mojo_bindings_blink_mojom
-mojom("mojo_bindings_blink") {
-  sources = [
-    "platform/modules/bluetooth/web_bluetooth.mojom",
-    "platform/modules/geolocation/geolocation.mojom",
-    "platform/modules/notifications/notification.mojom",
-    "platform/modules/payments/payment_request.mojom",
-    "platform/modules/permissions/permission.mojom",
-    "platform/modules/permissions/permission_status.mojom",
-  ]
-  for_blink = true
-  variant = "wtf"
-}
-
 # GYP version: WebKit/public/blink.gyp:mojo_bindings_mojom
 mojom("mojo_bindings") {
   sources = [