Stop linking in the old Mojo EDK.

mojo/platform_handle/BUILD.gn

Index: mojo/platform_handle/BUILD.gn
diff --git a/mojo/platform_handle/BUILD.gn b/mojo/platform_handle/BUILD.gn
index d5818f7f5de3627d3cf41d566ce36bbee8430e95..47a0c8466532ef16873aa3d42fbb10532e2bbe8d 100644
--- a/mojo/platform_handle/BUILD.gn
+++ b/mojo/platform_handle/BUILD.gn
@@ -15,6 +15,7 @@ source_set("platform_handle") {
     "platform_handle_functions.h",
   ]
   deps = [
+    "//mojo/edk/embedder:platform",
     "//mojo/public/c/system",
   ]
 }
@@ -30,8 +31,9 @@ component("platform_handle_impl") {
   defines = [ "PLATFORM_HANDLE_IMPLEMENTATION" ]
   deps = [
     "//base",
+    "//mojo/edk/embedder:headers",
+    "//mojo/edk/embedder:platform",
     "//mojo/public/c/system:for_component",
-    "//third_party/mojo/src/mojo/edk/embedder:headers",
   ]
 }