remove some unused imports and code

Assets/Engine/Runtime/Dimensions.cs

@@ -5,14 +5,6 @@ namespace EscapeRoomEngine.Engine.Runtime
 {
     public struct Dimensions
     {
-        internal Dimensions(int width, int length, int x, int z)
-        {
-            this.width = width;
-            this.length = length;
-            this.x = x;
-            this.z = z;
-        }
-        
         public int width;
         public int length;
         public int x;

Assets/Engine/Runtime/Modules/DoorState.cs

@@ -1,5 +1,4 @@
-using System;
-using EscapeRoomEngine.Engine.Runtime.Utilities;
+using EscapeRoomEngine.Engine.Runtime.Utilities;
 using NaughtyAttributes;
 
 namespace EscapeRoomEngine.Engine.Runtime.Modules

Assets/Engine/Runtime/Requirements/PreconditionRequirement.cs

@@ -33,10 +33,5 @@ namespace EscapeRoomEngine.Engine.Runtime.Requirements
 
             return preconditionsMet;
         }
-
-        protected static HashSet<bool> SetFor(bool value)
-        {
-            return value ? TrueSet : FalseSet;
-        }
     }
 }

Assets/Engine/Runtime/Space.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using EscapeRoomEngine.Engine.Runtime.Modules;
-using EscapeRoomEngine.Engine.Runtime.Requirements;
 using UnityEngine;
 using Logger = EscapeRoomEngine.Engine.Runtime.Utilities.Logger;
 using LogType = EscapeRoomEngine.Engine.Runtime.Utilities.LogType;
@@ -185,8 +184,14 @@ namespace EscapeRoomEngine.Engine.Runtime
             if(zMax == -1)
                 zMax = Utilities.Utilities.RandomInclusive(Math.Max(position.y + 1, zMin + minSize.y), availableSpace.y);
 
-            var dimensions = new Dimensions(xMax - xMin, zMax - zMin, xMin, zMin);
-            
+            var dimensions = new Dimensions
+            {
+                width = xMax - xMin,
+                length = zMax - zMin,
+                x = xMin,
+                z = zMin
+            };
+
             Logger.Log($"Generated space dimensions {dimensions} from entrance position {position}", LogType.RoomGeneration);
             
             return dimensions;