Core/Spells: Remove redundant explicit target checks from Spell::cast

src/server/game/Spells/Spell.cpp

@@ -3062,25 +3062,11 @@ void Spell::cast(bool skipCheck)
     // update pointers base at GUIDs to prevent access to non-existed already object
     UpdatePointers();
 
-    if (Unit* target = m_targets.GetUnitTarget())
+    // cancel at lost explicit target during cast
+    if (m_targets.GetObjectTargetGUID() && !m_targets.GetObjectTarget())
     {
-        // three check: prepare, cast (m_casttime > 0), hit (delayed)
-        if (m_casttime && target->isAlive() && !target->IsFriendlyTo(m_caster) && !m_caster->canSeeOrDetect(target))
-        {
-            SendCastResult(SPELL_FAILED_BAD_TARGETS);
-            SendInterrupted(0);
-            finish(false);
-            return;
-        }
-    }
-    else
-    {
-        // cancel at lost main target unit
-        if (m_targets.GetUnitTargetGUID() && m_targets.GetUnitTargetGUID() != m_caster->GetGUID())
-        {
-            cancel();
-            return;
-        }
+        cancel();
+        return;
     }
 
     // now that we've done the basic check, now run the scripts