Remove filename option from achievement manager load

The only option that was currently using this was a pass-by-executable that wouldn't hash correctly anyways.

Source/Core/Core/Boot/Boot.cpp

@@ -597,8 +597,6 @@ bool CBoot::BootUp(Core::System& system, const Core::CPUThreadGuard& guard,
         SetupGCMemory(system, guard);
       }
 
-      AchievementManager::GetInstance().LoadGame(executable.path, nullptr);
-
       if (!executable.reader->LoadIntoMemory(system))
       {
         PanicAlertFmtT("Failed to load the executable to memory.");