Cleanup of ModelBackedItem common functionality

SabreTools.DatItems/DatItem.cs

@@ -297,33 +297,6 @@ namespace SabreTools.DatItems
             return filterRunner.Run(_internal);
         }
 
-        /// <summary>
-        /// Remove a field from the DatItem
-        /// </summary>
-        /// <param name="fieldName">Field to remove</param>
-        /// <returns>True if the removal was successful, false otherwise</returns>
-        public bool RemoveField(string? fieldName)
-            => FieldManipulator.RemoveField(_internal, fieldName);
-
-        /// <summary>
-        /// Replace a field from another DatItem
-        /// </summary>
-        /// <param name="other">DatItem to replace field from</param>
-        /// <param name="fieldName">Field to replace</param>
-        /// <returns>True if the replacement was successful, false otherwise</returns>
-        public bool ReplaceField(DatItem? other, string? fieldName)
-            => FieldManipulator.ReplaceField(other?._internal, _internal, fieldName);
-
-        /// <summary>
-        /// Set a field in the DatItem from a mapping string
-        /// </summary>
-        /// <param name="fieldName">Field to set</param>
-        /// <param name="value">String representing the value to set</param>
-        /// <returns>True if the removal was successful, false otherwise</returns>
-        /// <remarks>This only performs minimal validation before setting</remarks>
-        public bool SetField(string? fieldName, string value)
-            => FieldManipulator.SetField(_internal, fieldName, value);
-
         #endregion
 
         #region Sorting and Merging