fix: remove build conditional from runtime classes

Author: mrdav30

Editor/Utility/FMSEditorUtility.cs

@@ -1,4 +1,5 @@
-using System;
+#if UNITY_EDITOR
+using System;
 using UnityEditor;
 using UnityEngine;
 
@@ -107,4 +108,5 @@ public static void Vector3dField(string Label, ref Vector3d vector)
 
         #endregion
     }
-}
+}
+#endif

Runtime/Attributes/FixedNumberAngleAttribute.cs

@@ -1,5 +1,4 @@
-#if UNITY_EDITOR
-using UnityEngine;
+using UnityEngine;
 
 namespace FixedMathSharp
 {
@@ -31,5 +30,4 @@ public FixedNumberAngleAttribute(double timescale = 1d, double max = -1d)
             Max = max;
         }
     }
-}
-#endif
+}

Runtime/Attributes/VectorRotationAttribute.cs

@@ -1,5 +1,4 @@
-#if UNITY_EDITOR
-using UnityEngine;
+using UnityEngine;
 
 namespace FixedMathSharp
 {
@@ -16,5 +15,4 @@ public VectorRotationAttribute(double timescale = 1d)
             Timescale = timescale;
         }
     }
-}
-#endif
+}