delete minor unreachable code caused by log.Fatal

[Abirdcfly]

Signed-off-by: Abirdcfly fp544037857@gmail.com

see https://go.dev/play/p/jlrIP76KOCf for example:

package main

import (
	"log"
	"testing"
)

func TestLastIndex(t *testing.T) {
	log.Fatalf("this line will print and exit")
	t.Errorf("this line can't print")
}

/* output:
=== RUN   TestLastIndex
2009/11/10 23:00:00 this line will print and exit

Program exited.
*/

[codecov-commenter]

Codecov Report

Merging #54 (79ec3b5) into main (337f08a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #54   +/-   ##
=======================================
  Coverage   83.76%   83.76%           
=======================================
  Files          46       46           
  Lines        3627     3627           
=======================================
  Hits         3038     3038           
  Misses        393      393           
  Partials      196      196           

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