Remove unused icon imports to fix ESLint warning count

frontend/src/components/pages/CCPMetricsPage.js

@@ -210,7 +210,7 @@ function VerticalDetailView({ vertical, onBack, onSelectMetric }) {
     const [categories, setCategories] = useState(null);
     const [burndown, setBurndown] = useState(null);
     const [loading, setLoading] = useState(true);
-    // ⚠️ CONVENTION: No error state — catch silently swallows errors without displaying them to the user
+    // ⚠️ CONVENTION: Missing error state — .catch() silently swallows errors without displaying them to the user. Add an error state and render an error message (see main CCPMetricsPage pattern).
 
     useEffect(() => {
         setLoading(true);
@@ -356,7 +356,7 @@ function VerticalDetailView({ vertical, onBack, onSelectMetric }) {
 function MetricDeviceList({ vertical, metricId, onBack }) {
     const [devices, setDevices] = useState(null);
     const [loading, setLoading] = useState(true);
-    // ⚠️ CONVENTION: No error state — catch silently swallows errors without displaying them to the user
+    // ⚠️ CONVENTION: Missing error state — .catch() silently swallows errors without displaying them to the user. Add an error state and render an error message (see main CCPMetricsPage pattern).
 
     useEffect(() => {
         setLoading(true);