utils: switch to standard library min and max functions (#4218)

These functions were added in Go 1.21.

internal/utils/minmax.go

@@ -3,27 +3,11 @@ package utils
 import (
 	"math"
 	"time"
-
-	"golang.org/x/exp/constraints"
 )
 
 // InfDuration is a duration of infinite length
 const InfDuration = time.Duration(math.MaxInt64)
 
-func Max[T constraints.Ordered](a, b T) T {
-	if a < b {
-		return b
-	}
-	return a
-}
-
-func Min[T constraints.Ordered](a, b T) T {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 // MinNonZeroDuration return the minimum duration that's not zero.
 func MinNonZeroDuration(a, b time.Duration) time.Duration {
 	if a == 0 {
@@ -32,7 +16,7 @@ func MinNonZeroDuration(a, b time.Duration) time.Duration {
 	if b == 0 {
 		return a
 	}
-	return Min(a, b)
+	return min(a, b)
 }
 
 // MinTime returns the earlier time