[config_parser] remove unneeded extra_configs

These are not relevant for the Go protocol buffer generated code.

This unblocks an improvement to the protobuf_library template that
will stop generating the C++ static library if only Go is needed:
https://fuchsia-review.googlesource.com/c/third_party/protobuf/+/442587

Bug: 61402
Change-Id: Ia1d49b0ecb9d0d1328de2eeff9aaaefe35e335ce
Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt/+/442715
Reviewed-by: Zach Bush <zmbush@google.com>
Commit-Queue: Gary Miguel <garymm@google.com>
diff --git a/src/bin/config_parser/src/BUILD.gn b/src/bin/config_parser/src/BUILD.gn
index b2be71a..042a201 100644
--- a/src/bin/config_parser/src/BUILD.gn
+++ b/src/bin/config_parser/src/BUILD.gn
@@ -14,11 +14,6 @@
   generate_go = true
   generate_python = false
   sources = [ "yamlpb/yamlpb_test.proto" ]
-
-  extra_configs = [
-    "$cobalt_root:cobalt_config",
-    "$cobalt_root/src/registry:proto_config",
-  ]
 }
 
 go_library("yamlpb_test_lib") {