Revert "feat(rollup_relayer): add chain_monitor client (#885)"

This reverts commit 3958e8bd86.

common/utils/http.go

@@ -1,27 +0,0 @@
-package utils
-
-import (
-	"net/http"
-	"time"
-)
-
-// StartHTTPServer a public http server to be used.
-func StartHTTPServer(address string, handler http.Handler) (*http.Server, error) {
-	srv := &http.Server{
-		Handler:      handler,
-		Addr:         address,
-		ReadTimeout:  time.Second * 3,
-		WriteTimeout: time.Second * 3,
-		IdleTimeout:  time.Second * 12,
-	}
-	errCh := make(chan error, 1)
-	go func() {
-		errCh <- srv.ListenAndServe()
-	}()
-	select {
-	case err := <-errCh:
-		return nil, err
-	case <-time.After(time.Second):
-	}
-	return srv, nil
-}

common/utils/utils.go

@@ -2,9 +2,6 @@ package utils
 
 import (
 	"context"
-	"crypto/rand"
-	"fmt"
-	"math/big"
 	"time"
 
 	"github.com/modern-go/reflect2"
@@ -53,9 +50,3 @@ func Loop(ctx context.Context, period time.Duration, f func()) {
 func IsNil(i interface{}) bool {
 	return i == nil || reflect2.IsNil(i)
 }
-
-// RandomURL return a random port endpoint.
-func RandomURL() string {
-	id, _ := rand.Int(rand.Reader, big.NewInt(5000-1))
-	return fmt.Sprintf("localhost:%d", 10000+2000+id.Int64())
-}