Revert "Solution Entities" (#23160)

Revert "Solution Entities (#21916)"

This reverts commit d75e743dd7.

Content.Server/Animals/Components/WoolyComponent.cs

@@ -1,5 +1,4 @@
 using Content.Server.Animals.Systems;
-using Content.Shared.Chemistry.Components;
 using Content.Shared.Chemistry.Reagent;
 using Content.Shared.FixedPoint;
 using Robust.Shared.Prototypes;
@@ -20,17 +19,11 @@ public sealed partial class WoolyComponent : Component
     [DataField, ViewVariables(VVAccess.ReadOnly)]
     public ProtoId<ReagentPrototype> ReagentId = "Fiber";
 
-    /// <summary>
-    ///     The name of <see cref="Solution"/>.
-    /// </summary>
-    [DataField, ViewVariables(VVAccess.ReadOnly)]
-    public string SolutionName = "wool";
-
     /// <summary>
     ///     The solution to add reagent to.
     /// </summary>
-    [DataField]
-    public Entity<SolutionComponent>? Solution;
+    [DataField, ViewVariables(VVAccess.ReadOnly)]
+    public string Solution = "wool";
 
     /// <summary>
     ///     The amount of reagent to be generated on update.