Revert "Refactor Damage to use Protoypes (#4262)"

This reverts commit 20bf5739a9.

Content.IntegrationTests/Tests/Commands/RejuvenateTest.cs

@@ -1,4 +1,4 @@
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Content.Server.Damage;
 using Content.Shared.Damage;
 using Content.Shared.Damage.Components;
@@ -7,7 +7,6 @@ using NUnit.Framework;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Map;
-using Robust.Shared.Prototypes;
 
 namespace Content.IntegrationTests.Tests.Commands
 {
@@ -21,7 +20,7 @@ namespace Content.IntegrationTests.Tests.Commands
   id: DamageableDummy
   components:
   - type: Damageable
-    damageContainer: biologicalDamageContainer
+    damagePrototype: biologicalDamageContainer
   - type: MobState
     thresholds:
       0: !type:NormalMobState {}
@@ -42,7 +41,6 @@ namespace Content.IntegrationTests.Tests.Commands
                 mapManager.CreateNewMapEntity(MapId.Nullspace);
 
                 var entityManager = IoCManager.Resolve<IEntityManager>();
-                var prototypeManager = IoCManager.Resolve<IPrototypeManager>();
 
                 var human = entityManager.SpawnEntity("DamageableDummy", MapCoordinates.Nullspace);
 
@@ -55,7 +53,7 @@ namespace Content.IntegrationTests.Tests.Commands
                 Assert.That(mobState.IsIncapacitated, Is.False);
 
                 // Kill the entity
-                damageable.TryChangeDamage(prototypeManager.Index<DamageGroupPrototype>("Toxin"), 10000000, true);
+                damageable.ChangeDamage(DamageClass.Brute, 10000000, true);
 
                 // Check that it is dead
                 Assert.That(mobState.IsAlive, Is.False);