Revert "feat(core): Ensure that all actions are compared to fixed point in time (#1236) (#1458)" (#1471)

This reverts commit 51b8773528.

src/server/game/Combat/ThreatManager.cpp

@@ -11,7 +11,6 @@
 #include "Map.h"
 #include "Player.h"
 #include "ObjectAccessor.h"
-#include "GameTime.h"
 #include "UnitEvents.h"
 #include "SpellAuras.h"
 #include "SpellMgr.h"
@@ -296,7 +295,7 @@ HostileReference* ThreatContainer::selectNextVictim(Creature* attacker, HostileR
     HostileReference* currentRef = NULL;
     bool found = false;
     bool noPriorityTargetFound = false;
-    uint32 currTime = GameTime::GetGameTime();
+    uint32 currTime = sWorld->GetGameTime();
 
     // pussywizard: currentVictim is needed to compare if threat was exceeded by 10%/30% for melee/range targets (only then switching current target)
     if (currentVictim)