Revert "Solution Entities" (#23160)

Revert "Solution Entities (#21916)"

This reverts commit d75e743dd7.

Content.Server/Body/Components/StomachComponent.cs

@@ -2,6 +2,7 @@
 using Content.Server.Nutrition.EntitySystems;
 using Content.Shared.Chemistry.Components;
 using Content.Shared.Chemistry.Reagent;
+using Content.Shared.FixedPoint;
 using Content.Shared.Whitelist;
 
 namespace Content.Server.Body.Components
@@ -14,32 +15,26 @@ namespace Content.Server.Body.Components
         /// <summary>
         ///     How fast should this component update, in seconds?
         /// </summary>
-        [DataField]
+        [DataField("updateInterval")]
         public float UpdateInterval = 1.0f;
 
-        /// <summary>
-        ///     The solution inside of this stomach this transfers reagents to the body.
-        /// </summary>
-        [DataField]
-        public Entity<SolutionComponent>? Solution = null;
-
         /// <summary>
         ///     What solution should this stomach push reagents into, on the body?
         /// </summary>
-        [DataField]
+        [DataField("bodySolutionName")]
         public string BodySolutionName = BloodstreamComponent.DefaultChemicalsSolutionName;
 
         /// <summary>
         ///     Time in seconds between reagents being ingested and them being
         ///     transferred to <see cref="BloodstreamComponent"/>
         /// </summary>
-        [DataField]
+        [DataField("digestionDelay")]
         public float DigestionDelay = 20;
 
         /// <summary>
         ///     A whitelist for what special-digestible-required foods this stomach is capable of eating.
         /// </summary>
-        [DataField]
+        [DataField("specialDigestible")]
         public EntityWhitelist? SpecialDigestible = null;
 
         /// <summary>