Revert DataArea change

This is being reverted because it was so disjoint from the other work that it is meant to work with that I was unaware of the intent of the code. This is not doing something that I feel is correct, so any changes here need to be merged into the other, more relevant PRs so it can be reviewed wholistically.

SabreTools.DatItems/Formats/Part.cs

@@ -27,6 +27,13 @@ namespace SabreTools.DatItems.Formats
         [XmlElement("features")]
         public List<PartFeature> Features { get; set; }
 
+        [JsonProperty("dataAreas", DefaultValueHandling = DefaultValueHandling.Ignore)]
+        [XmlElement("dataAreas")]
+        public List<DataArea> DataAreas { get; set; }
+        
+        [JsonIgnore]
+        public bool DataAreasSpecified { get { return DataAreas != null && DataAreas.Count > 0; } }
+        
         [JsonIgnore]
         public bool FeaturesSpecified { get { return Features != null && Features.Count > 0; } }
 
@@ -71,6 +78,7 @@ namespace SabreTools.DatItems.Formats
                 Name = this.Name,
                 Interface = this.Interface,
                 Features = this.Features,
+                DataAreas = this.DataAreas,                
             };
         }
 
@@ -102,6 +110,15 @@ namespace SabreTools.DatItems.Formats
                 }
             }
 
+            // If the dataareas match
+            if (DataAreasSpecified)
+            {
+                foreach (DataArea dataArea in DataAreas)
+                {
+                    match &= newOther.DataAreas.Contains(dataArea);
+                }
+            }
+
             return match;
         }