Remove unnecessary dependency on libkeystore_binder

Bug: 65192274
Test: Verified gatekeeper HAL binary, gatekeeper.ranchu.so, to make sure it has
      no dependecy on libkeystore_binder.so.

Change-Id: I859ac4fb28bd1d4f6b4127bc0831cd82db8c8ef2
diff --git a/gatekeeper/Android.mk b/gatekeeper/Android.mk
index dc995e4..0cb2c15 100644
--- a/gatekeeper/Android.mk
+++ b/gatekeeper/Android.mk
@@ -35,7 +35,6 @@
 	libbase \
 	libutils \
 	libcrypto \
-	libkeystore_binder \
 	libhidlbase \
 	libhidltransport \
 	libhwbinder \