Remove obsolete build flag.

No longer necessarry: "linux_use_bundled_binutils_override"

Bug: chromium:1164276
Change-Id: Id5d27b427e91204e71a74da572f3f369630ae54b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/37201
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Auto-Submit: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
diff --git a/build_overrides/build.gni b/build_overrides/build.gni
index 9bb8713..e883854 100644
--- a/build_overrides/build.gni
+++ b/build_overrides/build.gni
@@ -16,9 +16,6 @@
   # Tell Dawn and dependencies to not do Chromium-specific things
   build_with_chromium = false
 
-  # Use Chromium's binutils to have "hermetic" builds on bots
-  linux_use_bundled_binutils_override = true
-
   # In standalone Dawn builds, don't try to use the hermetic install of Xcode
   # that Chromium uses
   use_system_xcode = ""