Update comment on resultType

To reflect that it is no longer an abstract method to @OverRide

src/main/java/com/conveyal/analysis/results/CsvResultWriter.java

@@ -34,8 +34,8 @@ public abstract class CsvResultWriter extends BaseResultWriter implements Region
     protected final RegionalTask task;
 
     /**
-     * Override to return an Enum (usable as String) identifying the kind of results recorded by this CSV writer.
-     * This serves as a filename suffix to distinguish between different CSVs generated by a single regional analysis.
+     * An Enum (usable as String) identifying the kind of results recorded by this CSV writer. This also serves as a
+     * filename suffix to distinguish between different CSVs generated by a single regional analysis.
      */
     public final CsvResultType resultType;