Revert "Detect when unable to meet policy requirements"

This reverts commit 1223330ccc.

b/37460568

Change-Id: I936c06f679126ac50fb2d4753b4270b4ba42def5

libwvdrmengine/cdm/core/src/policy_engine.cpp

@@ -283,32 +283,6 @@ CdmResponseType PolicyEngine::QueryKeyAllowedUsage(
   return KEY_NOT_FOUND_1;
 }
 
-bool PolicyEngine::CanUseKey(
-    const KeyId& key_id,
-    CdmSecurityLevel security_level) {
-
-  if (security_level == kSecurityLevelL1) return true;
-
-  CdmKeyAllowedUsage key_usage;
-  CdmResponseType status = QueryKeyAllowedUsage(key_id, &key_usage);
-
-  if (status != NO_ERROR) return false;
-
-  // L1 has already been addressed so verify that L2/3 are allowed
-  switch (key_usage.key_security_level_) {
-    case kKeySecurityLevelUnset:
-      return true;
-    case kSoftwareSecureCrypto:
-      return security_level == kSecurityLevelL2 ||
-          security_level == kSecurityLevelL3;
-    case kSoftwareSecureDecode:
-    case kHardwareSecureCrypto:
-      return security_level == kSecurityLevelL2;
-    default:
-      return false;
-  }
-}
-
 bool PolicyEngine::GetSecondsSinceStarted(int64_t* seconds_since_started) {
   if (playback_start_time_ == 0) return false;