refactor: use the built-in max to simplify the code (#2697)

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## Overview

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In Go 1.21, the standard library includes built-in
[max/min](https://pkg.go.dev/builtin@go1.21.0#max) function, which can
greatly simplify the code.

Signed-off-by: russcoss <russcoss@outlook.com>
Co-authored-by: julienrbrt <julien@rbrt.fr>

Author: russcoss

block/internal/syncing/syncer.go

@@ -196,10 +196,7 @@ func (s *Syncer) initializeState() error {
 	s.SetLastState(state)
 
 	// Set DA height
-	daHeight := state.DAHeight
-	if daHeight < s.config.DA.StartHeight {
-		daHeight = s.config.DA.StartHeight
-	}
+	daHeight := max(state.DAHeight, s.config.DA.StartHeight)
 	s.SetDAHeight(daHeight)
 
 	s.logger.Info().
@@ -342,10 +339,7 @@ func (s *Syncer) syncLoop() {
 			}
 		default:
 			// Prevent busy-waiting when no events are available.
-			waitTime := 10 * time.Millisecond
-			if waitTime > s.config.Node.BlockTime.Duration {
-				waitTime = s.config.Node.BlockTime.Duration
-			}
+			waitTime := min(10*time.Millisecond, s.config.Node.BlockTime.Duration)
 
 			time.Sleep(waitTime)
 		}