Remove libkeymaster_staging

Test: Builds
Change-Id: I742a3e36fd96c3a1b37181f48aab7e5faa63b063
diff --git a/keymaster/3.0/default/Android.mk b/keymaster/3.0/default/Android.mk
index 6b66f7d..9e7d04a 100644
--- a/keymaster/3.0/default/Android.mk
+++ b/keymaster/3.0/default/Android.mk
@@ -12,7 +12,6 @@
     libsoftkeymasterdevice \
     libcrypto \
     libkeymaster_portable \
-    libkeymaster_staging \
     libpuresoftkeymasterdevice \
     libkeymaster3device \
     libhidlbase \