trust: Fix variable usage before null check

Change-Id: I8258b647b2cc32daa759562a0b5a03901b0edcd4
diff --git a/sdk/src/java/lineageos/trust/TrustInterface.java b/sdk/src/java/lineageos/trust/TrustInterface.java
index 3bb147f..ac5c5a1 100644
--- a/sdk/src/java/lineageos/trust/TrustInterface.java
+++ b/sdk/src/java/lineageos/trust/TrustInterface.java
@@ -198,7 +198,6 @@
             return sService;
         }
         IBinder b = ServiceManager.getService(LineageContextConstants.LINEAGE_TRUST_INTERFACE);
-        sService = ITrustInterface.Stub.asInterface(b);
 
         if (b == null) {
             Log.e(TAG, "null service. SAD!");