chore: remove unused min/max func (#1497)

Signed-off-by: withtimezone <with_timezone@outlook.com>

Author: withtimezone

examples/tabs/main.go

@@ -98,17 +98,3 @@ func main() {
 		os.Exit(1)
 	}
 }
-
-func max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
-
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}