Remove libkeymaster_staging

Test: Builds
Change-Id: I830c22745ca5f19eb53ef1862e5cfc4b080d7d6a
diff --git a/keystore/Android.bp b/keystore/Android.bp
index 6e69e0a..bfbc72f 100644
--- a/keystore/Android.bp
+++ b/keystore/Android.bp
@@ -51,7 +51,6 @@
         "libhwbinder",
         "libkeymaster_messages",
         "libkeymaster_portable",
-        "libkeymaster_staging",
         "libkeystore_aidl",
         "libkeystore_binder",
         "libkeystore_parcelables",