Revert "epic Respiration Rework" (#6524)

Content.Shared/Alert/AlertCategory.cs

@@ -12,6 +12,5 @@ public enum AlertCategory
     Health,
     Piloting,
     Hunger,
-    Thirst,
-    Toxins
-}
+    Thirst
+}

Content.Shared/Alert/AlertType.cs

@@ -31,7 +31,6 @@
         Pulled,
         Pulling,
         Magboots,
-        Toxins,
         Debug1,
         Debug2,
         Debug3,

Content.Shared/Atmos/Atmospherics.cs

@@ -255,10 +255,11 @@ namespace Content.Shared.Atmos
         /// </summary>
         public const float NormalBodyTemperature = 37f;
 
-        /// <summary>
-        ///     I hereby decree. This is Arbitrary Suck my Dick
-        /// </summary>
-        public const float BreathMolesToReagentMultiplier = 1144;
+        public const float HumanNeededOxygen = MolesCellStandard * BreathPercentage * 0.16f;
+
+        public const float HumanProducedOxygen = HumanNeededOxygen * 0.75f;
+
+        public const float HumanProducedCarbonDioxide = HumanNeededOxygen * 0.25f;
 
         #region Pipes
 

Content.Shared/Atmos/Prototypes/GasPrototype.cs

@@ -1,7 +1,5 @@
-using Content.Shared.Chemistry.Reagent;
-using Robust.Shared.Prototypes;
+using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization.Manager.Attributes;
-using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
 using Robust.Shared.ViewVariables;
 
 namespace Content.Shared.Atmos.Prototypes
@@ -72,12 +70,6 @@ namespace Content.Shared.Atmos.Prototypes
         [DataField("overlayPath")]
         public string OverlayPath { get; } = string.Empty;
 
-        /// <summary>
-        /// The reagent that this gas will turn into when inhaled.
-        /// </summary>
-        [DataField("reagent", customTypeSerializer:typeof(PrototypeIdSerializer<ReagentPrototype>))]
-        public string? Reagent { get; } = default!;
-
         [DataField("color")] public string Color { get; } = string.Empty;
     }
 }