Remove deny_warnings attribute am: 11d459e366

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/clang-sys/+/1352860

Change-Id: I8b43c315ae26afca9e8b007abe0f435ad2d2b55e
diff --git a/Android.bp b/Android.bp
index bd977c4..8d0a51d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -2,7 +2,6 @@
 
 rust_library_host_rlib {
     name: "libclang_sys",
-    deny_warnings: false,
     crate_name: "clang_sys",
     srcs: ["src/lib.rs"],
     edition: "2015",