These include paths are invalid and crash the build process.

diff '--color=auto' -ur a/src/third_party/grpc/dist/bazel/grpc_build_system.bzl b/src/third_party/grpc/dist/bazel/grpc_build_system.bzl
--- a/src/third_party/grpc/dist/bazel/grpc_build_system.bzl	2026-06-15 18:37:04.000000000 -0400
+++ b/src/third_party/grpc/dist/bazel/grpc_build_system.bzl	2026-06-19 11:26:06.015089039 -0400
@@ -179,8 +179,6 @@
         linkopts = linkopts,
         includes = [
             include_prefix + "include",
-            include_prefix + "src/core/ext/upb-gen",  # Once upb code-gen issue is resolved, remove this.
-            include_prefix + "src/core/ext/upbdefs-gen",  # Once upb code-gen issue is resolved, remove this.
         ],
         alwayslink = alwayslink,
         data = data,