remove duplicate and unused fields

lib/DataHarmonizer.js

@@ -1704,7 +1704,7 @@ class DataHarmonizer {
 
   fillColumn(colname, value) {
     const fieldYCoordinates = this.getFieldYCoordinates();
-    const fields = this.getFields();
+    // const fields = this.getFields();
 
     // console.log(
     //   colname,
@@ -2100,20 +2100,6 @@ class DataHarmonizer {
     return map;
   }
 
-  /**
-   * Get name of slots given titles via an inverted index
-   * @param {Array} fields the fields representation for DataHarmonizer
-   * @return {Dictionary<String, String>}
-   */
-  getFieldTitleMap(fields) {
-    const columnHeaders = this.hot.getColHeader().map(stripDiv);
-    let preMap = invert(this.getFieldNameMap(fields));
-    return Object.keys(preMap).reduce((acc, col_index) => {
-      acc[columnHeaders[col_index]] = preMap[col_index];
-      return acc;
-    }, {});
-  }
-
   /**
    * Modifies exportHeaders map of fields so that each field contains an array
    * of one or more source fields by name that are used to compose it.