Revert "Add 'stubs' to libbinder_ndk"

This reverts commit 6a4cf15d19e452eccc82d353feba891475eaf53f.

Reason for revert: Build error on ndk build.

Change-Id: I22430a6e20c3c5f690bd2e0d85df611ca0eceb6e
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index dc4e000..d799c5f 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -40,10 +40,6 @@
     ],
 
     version_script: "libbinder_ndk.map.txt",
-    stubs: {
-        symbol_file: "libbinder_ndk.map.txt",
-        versions: ["29"],
-    },
 }
 
 ndk_headers {