Remover code to own class

This was the last of the major bits of code that was technically distinct from Cleaning. This means that each of the bits of functionality that used to all be in Cleaner are split out into their approrpriate classes.

SabreTools.Filtering/DatItemRemover.cs

@@ -10,7 +10,7 @@ namespace SabreTools.Filtering
     /// <summary>
     /// Represents the removal operations that need to be performed on a set of items, usually a DAT
     /// </summary>
-    public class DatItemRemover : Remover
+    public class DatItemRemover
     {
         #region Fields
 
@@ -26,22 +26,13 @@ namespace SabreTools.Filtering
 
         #endregion
 
-        #region Constructors
-
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        public DatItemRemover()
-        {
-            logger = new Logger(this);
-        }
-
-        #endregion
-
         #region Population
 
-        /// <inheritdoc/>
-        public override bool SetRemover(string field)
+        /// <summary>
+        /// Set remover from a value
+        /// </summary>
+        /// <param name="field">Key for the remover to be set</param>
+        public bool SetRemover(string field)
         {
             // If the key is null or empty, return false
             if (string.IsNullOrWhiteSpace(field))