everything related to the FW 20 has been deleted.

src/core/hle/service/lm/lm.cpp

@@ -88,8 +88,6 @@ public:
         static const FunctionInfo functions[] = {
             {0, &ILogger::Log, "Log"},
             {1, &ILogger::SetDestination, "SetDestination"},
-            {2, nullptr, "TransmitHashedLog"}, // 20.0.0+
-            {3, nullptr, "DevNotify"}, // 20.0.0+
         };
         RegisterHandlers(functions);
     }