fix minor unreachable code caused by log.Fatal

[Abirdcfly]

https://pkg.go.dev/log#Fatalf

Fatalf is equivalent to Printf() followed by a call to os.Exit(1).

see https://go.dev/play/p/iw2MCkHArJZ for example:

package main

import "log"

func main() {
	log.Println("Println will print and not exit")
	log.Fatalf("Fatalf will print and exit")
	log.Println("this line cant reach")
}

/* output:
2009/11/10 23:00:00 Println will print and not exit
2009/11/10 23:00:00 Fatalf will print and exit

Program exited.
*/

---

Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:

• Choose reviewer(s) and mention them in a comment (R: @username).
• Mention the appropriate issue in your description (for example: addresses #123), if applicable. This will automatically add a link to the pull request in the issue. If you would like the issue to automatically close on merging the pull request, comment fixes #<ISSUE NUMBER> instead.
• Update CHANGES.md with noteworthy changes.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

See the Contributor Guide for more tips on how to make review process smoother.

To check the build health, please visit https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI.

R: @lostluck
R: @jrmccluskey
(just found that you have recently reviewed the go code)

[Abirdcfly]

R: @lostluck

[Abirdcfly]

R: @jrmccluskey

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[codecov]

Codecov Report

Merging #22618 (83dd3c5) into master (17fb9c0) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #22618      +/-   ##
==========================================
- Coverage   74.20%   74.20%   -0.01%     
==========================================
  Files         708      710       +2     
  Lines       93462    93547      +85     
==========================================
+ Hits        69355    69414      +59     
- Misses      22832    22856      +24     
- Partials     1275     1277       +2     

Flag	Coverage Δ
go	51.54% <ø> (+0.02%)	⬆️
python	83.60% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
sdks/python/apache_beam/utils/interactive_utils.py	95.12% <0.00%> (-2.44%)	⬇️
sdks/python/apache_beam/utils/subprocess_server.py	56.54% <0.00%> (-2.20%)	⬇️
sdks/python/apache_beam/internal/metrics/metric.py	93.00% <0.00%> (-1.00%)	⬇️
sdks/python/apache_beam/io/localfilesystem.py	90.97% <0.00%> (-0.76%)	⬇️
...eam/runners/portability/fn_api_runner/execution.py	92.44% <0.00%> (-0.65%)	⬇️
sdks/python/apache_beam/runners/direct/executor.py	96.46% <0.00%> (-0.55%)	⬇️
sdks/python/apache_beam/transforms/combiners.py	93.05% <0.00%> (-0.39%)	⬇️
sdks/python/apache_beam/coders/coders.py	88.00% <0.00%> (-0.35%)	⬇️
...ks/python/apache_beam/runners/worker/sdk_worker.py	88.94% <0.00%> (-0.16%)	⬇️
sdks/python/apache_beam/transforms/util.py	96.06% <0.00%> (-0.16%)	⬇️
... and 16 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[damccorm]

Thanks for cleaning this up! Just had a couple small comments, then I'd like to merge

[damccorm]

LGTM - thanks for the contribution!