remove handling signals as they are handled in main function

cmd/agent/run.go

@@ -7,9 +7,7 @@ import (
 	"net"
 	"net/http"
 	"os"
-	"os/signal"
 	"runtime"
-	"syscall"
 	"time"
 
 	"github.com/samber/lo"
@@ -116,13 +114,10 @@ func runAgentMode(ctx context.Context, castaiclient castai.Client, log *logrus.E
 	ctx, ctxCancel := context.WithCancel(ctx)
 	defer ctxCancel()
 
-	sigChan := make(chan os.Signal, 1)
-	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM, syscall.SIGKILL)
-
 	// buffer will allow for all senders to push, even though we will only read first error and cancel context after it;
 	// all errors from exitCh are logged
 	exitCh := make(chan error, 10)
-	go watchExitErrors(ctx, log, exitCh, sigChan, ctxCancel)
+	go watchExitErrors(ctx, log, exitCh, ctxCancel)
 
 	agentVersion := config.VersionInfo
 	log.Infof("running agent version: %v", agentVersion)
@@ -250,17 +245,14 @@ func runAgentMode(ctx context.Context, castaiclient castai.Client, log *logrus.E
 }
 
 // if any errors are observed on exitCh, context cancel is called, and all errors in the channel are logged
-func watchExitErrors(ctx context.Context, log *logrus.Entry, exitCh chan error, sigChan chan os.Signal, ctxCancel func()) {
+func watchExitErrors(ctx context.Context, log *logrus.Entry, exitCh chan error, ctxCancel func()) {
 	for {
 		select {
 		case err := <-exitCh:
 			if err != nil && !errors.Is(err, context.Canceled) {
 				log.Errorf("agent stopped with an error: %v", err)
 			}
 			ctxCancel()
-		case s := <-sigChan:
-			log.Infof("received system signal: %v, closing agent", s)
-			ctxCancel()
 		case <-ctx.Done():
 			log.Infof("context done")
 			return