Switch back to the old go generator.

mojo/public/tools/bindings/mojom.gni

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("../../mojo_sdk.gni")
 
 # Generate C++/JavaScript/Java/Python/Dart/Go source files from mojom files. The
 # output files will go under the generated file directory tree with the same
 # path as each input file.
 #
@@ skipping 194 matching lines @@
         "--src-root-path",
         rebase_path("//", root_build_dir),
         "-I",
         rebase_path("//", root_build_dir),
         "-I",
         rebase_path(mojo_root, root_build_dir),
         "--output-dir",
         rebase_path(root_gen_dir),
         "--no-gen-imports",
         "--generators",
-        "legacy,c,go",
+        "legacy,c",
       ]
 
       if (defined(invoker.generate_type_info) && invoker.generate_type_info) {
         args += [
           "--gen-arg",
           "generate-type-info",
         ]
       }
 
       if (defined(invoker.import_dirs)) {
@@ skipping 325 matching lines @@
         # //mojo/something:something and we can append "_java" to get the java
         # dependency name.
         full_name = get_label_info(d, "label_no_toolchain")
         deps += [ "${full_name}_java" ]
       }
 
       srcjar_deps = [ ":$java_srcjar_target_name" ]
     }
   }
 }