New Mojom parser: Remove dependency on CGO.

mojom/BUILD.gn

Index: mojom/BUILD.gn
diff --git a/mojom/BUILD.gn b/mojom/BUILD.gn
index e6d09f819e9b506209b525d402b409bae7ab0f62..c8ca4643445fb6e057d95f3d9c0b6e87bdb5b695 100644
--- a/mojom/BUILD.gn
+++ b/mojom/BUILD.gn
@@ -6,18 +6,8 @@ import("//testing/test.gni")
 
 group("mojom") {
   testonly = true
-  deps = [
-    ":tests",
-  ]
-  if (is_linux && defined(go_build_tool) && go_build_tool != "") {
-    deps += [ "//mojom/mojom_parser" ]
-  }
-}
-
-group("tests") {
-  testonly = true
   deps = []
   if (is_linux && defined(go_build_tool) && go_build_tool != "") {
-    deps += [ "//mojom/mojom_parser:serialization_test" ]
+    deps += [ "//mojom/mojom_parser" ]
   }
 }