Remove unused m_debug_only member from Arg struct

src/util/system.cpp

@@ -549,7 +549,7 @@ void ArgsManager::AddArg(const std::string& name, const std::string& help, unsig
 
     LOCK(cs_args);
     std::map<std::string, Arg>& arg_map = m_available_args[cat];
-    auto ret = arg_map.emplace(name.substr(0, eq_index), Arg{name.substr(eq_index, name.size() - eq_index), help, flags, false});
+    auto ret = arg_map.emplace(name.substr(0, eq_index), Arg{name.substr(eq_index, name.size() - eq_index), help, flags});
     assert(ret.second); // Make sure an insertion actually happened
 }
 

src/util/system.h

@@ -152,7 +152,6 @@ protected:
         std::string m_help_param;
         std::string m_help_text;
         unsigned int m_flags;
-        bool m_debug_only;
     };
 
     mutable CCriticalSection cs_args;