Remove libc_headers from cc_object

cc_object modules get default libraries like libc now and no longer
need to explicitly include libc_headers.

Bug: 153662223
Test: m bcm_object
Change-Id: Ic47f29c689a9cd82831ebd5addc6782d6e0e528e
diff --git a/Android.bp b/Android.bp
index e2a4a78..d496a8e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -129,11 +129,7 @@
         fuzzer: false,
     },
     target: {
-        linux_bionic: {
-            header_libs: ["libc_headers"], // TODO(b/153662223): Clean this up.
-        },
         android: {
-            header_libs: ["libc_headers"], // TODO(b/153662223): Clean this up.
             cflags: [
                 "-DBORINGSSL_FIPS",
                 "-fPIC",