move check for linestyle to plotseries fetch function

src/plugins/plot/src/configuration/PlotSeries.js

@@ -140,9 +140,14 @@ define([
          * @returns {Promise}
          */
         fetch: function (options) {
-            const strategy = options && options.shouldNotUseMinMax ? undefined : 'minMax';
+            let strategy;
+
+            if (this.model.interpolate !== 'none') {
+                strategy = 'minMax';
+            }
 
             options = _.extend({}, { size: 1000, strategy, filters: this.filters }, options || {});
+
             if (!this.unsubscribe) {
                 this.unsubscribe = this.openmct
                     .telemetry
@@ -379,19 +384,6 @@ define([
                 delete this.unsubscribe;
             }
             this.fetch();
-        },
-
-        /**
-         * Clears the plot series, unsubscribes and resubscribes
-         * @public
-         */
-        refresh: function () {
-            this.reset();
-            if (this.unsubscribe) {
-                this.unsubscribe();
-                delete this.unsubscribe;
-            }
-            this.fetch();
         }
     });
 

src/plugins/plot/src/telemetry/PlotController.js

@@ -102,8 +102,7 @@ define([
         this.startLoading();
         var options = {
             size: this.$element[0].offsetWidth,
-            domain: this.config.xAxis.get('key'),
-            shouldNotUseMinMax: this.shouldNotUseMinMax(series)
+            domain: this.config.xAxis.get('key')
         };
 
         series.load(options)
@@ -161,10 +160,6 @@ define([
         return config;
     };
 
-    PlotController.prototype.shouldNotUseMinMax = function (series) {
-        return series.model.interpolate === 'none';
-    };
-
     PlotController.prototype.onTimeSystemChange = function (timeSystem) {
         this.config.xAxis.set('key', timeSystem.key);
     };