Remove unnecessary code

src/init.cpp

@@ -432,9 +432,6 @@ std::string HelpMessage(HelpMessageMode mode)
     if (showDebug)
     {
         strUsage += HelpMessageOpt("-printpriority", strprintf("Log transaction priority and fee per kB when mining blocks (default: %u)", DEFAULT_PRINTPRIORITY));
-#ifdef ENABLE_WALLET
-        strUsage += HelpMessageOpt("-privdb", strprintf("Sets the DB_PRIVATE flag in the wallet db environment (default: %u)", DEFAULT_WALLET_PRIVDB));
-#endif
     }
     strUsage += HelpMessageOpt("-shrinkdebugfile", _("Shrink debug.log file on client startup (default: 1 when no -debug)"));