making symptoms for scatter chart axes selectable

docs/SymptomsCausedByCOVIDLots/js/SymptomVsSymptomChartView.js

@@ -7,7 +7,6 @@ class SymptomVsSymptomChartView {
         this.#canvas = canvas;
     }
 
-    // FK-TODO: refactor
     loadAndDisplayChart(symptomX, symptomY) {
         Promise
             .all([symptomX, symptomY].map(symptom => PrrByVaccineProvider.getPrrByVaccine(symptom)))
@@ -18,12 +17,6 @@ class SymptomVsSymptomChartView {
                 });
     }
 
-    setData(histoDescr) {
-        const data = this.#getData(histoDescr);
-        this.#chart.config.data = data;
-        this.#chart.update();
-    }
-
     #displayChart(symptomX, symptomY, labels, data) {
         if (this.#chart != null) {
             this.#chart.destroy();