Remove auto-appended units

Remove duplicate units from metrics dashboard graphs

app/assets/javascripts/monitoring/components/charts/area.vue

@@ -139,8 +139,7 @@ export default {
       return this.graphData.queries.map(query => query.label).join(', ');
     },
     yAxisLabel() {
-      const [query] = this.graphData.queries;
-      return `${this.graphData.y_label} (${query.unit})`;
+      return `${this.graphData.y_label}`;
     },
   },
   watch: {

changelogs/unreleased/56477-units-are-appended-to-y-axis-label-on-metrics-dashboard.yml

+---
+title: Remove duplicate units from metrics graph
+merge_request: 25485
+author:
+type: fixed

spec/javascripts/monitoring/charts/area_spec.js

@@ -127,7 +127,7 @@ describe('Area component', () => {
         });
 
         it('formats tooltip content', () => {
-          expect(areaChart.vm.tooltip.content).toBe('CPU (Cores) 5.556');
+          expect(areaChart.vm.tooltip.content).toBe('CPU 5.556');
         });
       });
 
@@ -213,7 +213,7 @@ describe('Area component', () => {
 
     describe('yAxisLabel', () => {
       it('constructs a label for the chart y-axis', () => {
-        expect(areaChart.vm.yAxisLabel).toBe('CPU (Cores)');
+        expect(areaChart.vm.yAxisLabel).toBe('CPU');
       });
     });
   });