Core/Spells: Changed boss knockback immunity

src/server/game/Entities/Unit/Unit.cpp

@@ -16200,7 +16200,7 @@ void Unit::KnockbackFrom(float x, float y, float speedXY, float speedZ)
         player = (Player*)this;
     else
     {
-        player = dynamic_cast<Player*>(GetCharmer());
+        player = GetCharmer()->ToPlayer();
         if (player && player->m_mover != this)
             player = NULL;
     }

src/server/game/Spells/SpellEffects.cpp

@@ -6074,6 +6074,10 @@ void Spell::EffectKnockBack(SpellEffIndex effIndex)
     if (!unitTarget)
         return;
 
+    if (Creature* creatureTarget = unitTarget->ToCreature())
+        if (creatureTarget->isWorldBoss() || creatureTarget->IsDungeonBoss())
+            return;
+
     // Typhoon
     if (m_spellInfo->SpellFamilyName == SPELLFAMILY_DRUID && m_spellInfo->SpellFamilyFlags[1] & 0x01000000)
     {

src/server/game/Spells/SpellMgr.cpp

@@ -3547,12 +3547,6 @@ void SpellMgr::LoadSpellCustomAttr()
                     }
                     break;
                 }
-                case SPELL_EFFECT_KNOCK_BACK:
-                case SPELL_EFFECT_KNOCK_BACK_DEST:
-                    if (spellInfo->EffectMechanic[i] == MECHANIC_NONE)
-                        spellInfo->EffectMechanic[i] = MECHANIC_KNOCKOUT;
-                    ++count;
-                    break;
             }
 
             switch (SpellTargetType[spellInfo->EffectImplicitTargetA[j]])