Core/Movement: backported cleanup for determining follow movement on appearing instead of calling evade modes right away

src/server/game/Spells/SpellEffects.cpp

@@ -1929,8 +1929,6 @@ void Spell::EffectSummonType(SpellEffIndex effIndex)
                     summon->SetUInt32Value(UNIT_NPC_FLAGS, summon->GetCreatureTemplate()->npcflag);
 
                     summon->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_IMMUNE_TO_PC | UNIT_FLAG_IMMUNE_TO_NPC);
-
-                    summon->AI()->EnterEvadeMode();
                     break;
                 }
                 default:
@@ -5383,8 +5381,6 @@ void Spell::SummonGuardian(uint32 i, uint32 entry, SummonPropertiesEntry const*
                 summon->SetDisplayId(1126); // modelid1
         }
 
-        summon->AI()->EnterEvadeMode();
-
         ExecuteLogEffectSummonObject(i, summon);
     }
 }