refactor: use the built-in max/min to simplify the code (#17059)

### Summary

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: futurehua <futurehua@outlook.com>

internal/cli/filesystem/dataset.go

@@ -711,13 +711,6 @@ func getString(v interface{}) string {
 	return fmt.Sprintf("%v", v)
 }
 
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 func getFloat(v interface{}) float64 {
 	if v == nil {
 		return 0

internal/cli/filesystem/skill_hub/source/clawhub.go

@@ -914,10 +914,3 @@ func isTextContent(data []byte) bool {
 	// Check for null bytes (indicates binary)
 	return !slices.Contains(data, 0)
 }
-
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}