Widevine drm aidl: address API review

Interface update in change 16810770

Bug: 214410088
Test: atest VtsAidlHalDrmTargetTest
Change-Id: I19da51ef75952f5ff6c7c02e0393f574e69ee30b

libwvdrmengine/aidl_include/WVCreatePluginFactories.h

@@ -7,7 +7,6 @@
 #ifndef WV_CREATE_PLUGIN_FACTORIES_H_
 #define WV_CREATE_PLUGIN_FACTORIES_H_
 
-#include "WVCryptoFactory.h"
 #include "WVDrmFactory.h"
 
 namespace wvdrm {
@@ -16,7 +15,6 @@ namespace drm {
 namespace widevine {
 
 std::shared_ptr<WVDrmFactory> createDrmFactory();
-std::shared_ptr<WVCryptoFactory> createCryptoFactory();
 
 }  // namespace widevine
 }  // namespace drm