Revert "Detect when unable to meet policy requirements"

This reverts commit 1223330ccc.

b/37460568

Change-Id: I936c06f679126ac50fb2d4753b4270b4ba42def5

libwvdrmengine/cdm/core/include/policy_engine.h

@@ -34,10 +34,6 @@ class PolicyEngine {
   // status is not calculated to avoid overhead in the decryption path.
   virtual bool CanDecryptContent(const KeyId& key_id);
 
-  // Verifies whether the policy allows use of the specified key of
-  // a given security level for content decryption.
-  virtual bool CanUseKey(const KeyId& key_id, CdmSecurityLevel security_level);
-
   // OnTimerEvent is called when a timer fires. It notifies the Policy Engine
   // that the timer has fired and dispatches the relevant events through
   // |event_listener_|.