Fix win_res.bzl's use of the cc toolchain.

It doesn't have one.

PiperOrigin-RevId: 362274900
diff --git a/src/main/res/win_res.bzl b/src/main/res/win_res.bzl
index 6c8dd27..01376ef9d 100644
--- a/src/main/res/win_res.bzl
+++ b/src/main/res/win_res.bzl
@@ -70,9 +70,6 @@
             allow_files = True,
             doc = "Additional input files that RC files reference, if any.",
         ),
-        "_cc_toolchain": attr.label(
-            default = Label("@local_config_cc//:toolchain"),
-        ),
     },
     fragments = ["cpp"],
     toolchains = [WINDOWS_RESOURCE_COMPILER_TOOLCHAIN_TYPE],