[Cleanup] Remove authenticated from launcher_link.cpp and launcher_link.h (#3101)

# Notes
- This is unused.

world/launcher_link.cpp

@@ -37,7 +37,6 @@ extern LauncherList launcher_list;
 LauncherLink::LauncherLink(int id, std::shared_ptr<EQ::Net::ServertalkServerConnection> c)
 	: ID(id),
 	tcpc(c),
-	authenticated(false),
 	m_name(""),
 	m_bootTimer(2000)
 {

world/launcher_link.h

@@ -64,7 +64,6 @@ protected:
 	const int			ID;
 	std::shared_ptr<EQ::Net::ServertalkServerConnection> tcpc;
 	std::unique_ptr<EQ::Timer> m_process_timer;
-	bool				authenticated;
 	std::string			m_name;
 	Timer				m_bootTimer;