Fix lint errors.

.golangci.yaml

@@ -57,6 +57,7 @@ linters-settings:
           - (github.com/golangci/golangci-lint/pkg/logutils.Log).Fatalf
     disable:
       - fieldalignment
+      - shadow
     enable-all: true
   misspell:
     locale: US

receiver/dcgmreceiver/client.go

@@ -358,13 +358,13 @@ func (client *dcgmClient) collect() (time.Duration, error) {
 func (client *dcgmClient) getDeviceMetrics() map[uint]deviceMetrics {
 	out := map[uint]deviceMetrics{}
 	for gpuIndex, device := range client.devices {
-		new := MetricsMap{}
+		newMetrics := MetricsMap{}
 		for key, value := range device.Metrics {
 			newValue := *value
-			new[key] = &newValue
+			newMetrics[key] = &newValue
 		}
 		// device is already a copy here
-		device.Metrics = new
+		device.Metrics = newMetrics
 		out[gpuIndex] = device
 	}
 	return out

receiver/dcgmreceiver/scraper.go

@@ -84,7 +84,7 @@ func (s *dcgmScraper) start(ctx context.Context, _ component.Host) error {
 
 	s.cancel = func() {
 		scrapeCancel()
-		g.Wait()
+		_ = g.Wait() // Ignore the error from a canceled context
 	}
 
 	metricsCh := make(chan map[uint]deviceMetrics)
@@ -196,7 +196,6 @@ func (s *dcgmScraper) runConnectLoop(ctx context.Context, metricsCh chan<- map[u
 		case <-time.After(s.initRetryDelay):
 		}
 	}
-	return nil
 }
 
 func (s *dcgmScraper) pollClient(ctx context.Context, client *dcgmClient, metricsCh chan<- map[uint]deviceMetrics, collectTriggerCh <-chan struct{}) {