update:use builtin cmp func (#4879)

core/mathx/int.go

@@ -1,19 +1,13 @@
 package mathx
 
 // MaxInt returns the larger one of a and b.
+// Deprecated: use builtin max instead.
 func MaxInt(a, b int) int {
-	if a > b {
-		return a
-	}
-
-	return b
+	return max(a, b)
 }
 
 // MinInt returns the smaller one of a and b.
+// Deprecated: use builtin min instead.
 func MinInt(a, b int) int {
-	if a < b {
-		return a
-	}
-
-	return b
+	return min(a, b)
 }