Remove redundant u128 config.platform-tools-29.0.5ndk-sysroot-r21

* Older version has u128 config choice,
  which is default in the current version.

Test: m libproc_macro2
Change-Id: Id6996cca654a67d86b17069c71a922ae5838c50e

1 files changed, 0 insertions, 1 deletions

diff --git a/Android.bp b/Android.bp
index 5d03a89..7c4f5d0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -5,7 +5,6 @@ rust_library_rlib {
     srcs: ["src/lib.rs"],
     rlibs: ["libunicode_xid"],
     flags: [
-        "--cfg u128",
         "--cfg use_proc_macro",
         "--cfg wrap_proc_macro",
     ],