Remove asl_log (Fixes #25380) (#25382)
Remove asl_log (Fixes #25380) (#25382)

Summary:
By default absolutely everything gets logged twice (https://github.com/facebook/react-native/issues/25380).
This was introduced over 4 years ago here:

[React Native Log to ASL · facebook/react-native@d1b14ef · GitHub](https://github.com/facebook/react-native/commit/d1b14ef0627dc04847500faa7fef75fd3c22c900)

with the reason to support ASL.
With this PR the support for that will be removed but I believe this is justified because:

- the benefit of not having every log message twice far outweighs the benefit of having Apple System Log.
- ASL was superseded by "unified logging" (yellow box on https://developer.apple.com/documentation/os/logging).
- I assume that people who use asl_log is very small. There is also very little information about it on the internet

## Changelog

[iOS] [Fixed] - Logs would get printed twice
Pull Request resolved: https://github.com/facebook/react-native/pull/25382

Differential Revision: D16048052

Pulled By: cpojer

fbshipit-source-id: 51519570bbee79571e4ff63f433b9b70bcd55671

facebook/react-native,exponent/react-native,hoangpham95/react-native,exponentjs/react-native,janicduplessis/react-native,javache/react-native,exponent/react-native,exponent/react-native,javache/react-native,hoangpham95/react-native,exponent/react-native,janicduplessis/react-native,hoangpham95/react-native,janicduplessis/react-native,pandiaraj44/react-native,javache/react-native,exponent/react-native,myntra/react-native,exponentjs/react-native,janicduplessis/react-native,janicduplessis/react-native,hoangpham95/react-native,javache/react-native,janicduplessis/react-native,myntra/react-native,pandiaraj44/react-native,hammerandchisel/react-native,facebook/react-native,hammerandchisel/react-native,facebook/react-native,pandiaraj44/react-native,exponentjs/react-native,pandiaraj44/react-native,pandiaraj44/react-native,exponentjs/react-native,javache/react-native,hammerandchisel/react-native,hammerandchisel/react-native,myntra/react-native,arthuralee/react-native,facebook/react-native,hammerandchisel/react-native,myntra/react-native,myntra/react-native,janicduplessis/react-native,hoangpham95/react-native,pandiaraj44/react-native,exponentjs/react-native,exponent/react-native,javache/react-native,facebook/react-native,arthuralee/react-native,facebook/react-native,hoangpham95/react-native,myntra/react-native,javache/react-native,arthuralee/react-native,facebook/react-native,hoangpham95/react-native,myntra/react-native,hoangpham95/react-native,arthuralee/react-native,exponentjs/react-native,hammerandchisel/react-native,pandiaraj44/react-native,javache/react-native,hammerandchisel/react-native,janicduplessis/react-native,javache/react-native,exponent/react-native,arthuralee/react-native,pandiaraj44/react-native,exponent/react-native,exponentjs/react-native,myntra/react-native,hammerandchisel/react-native,exponentjs/react-native,myntra/react-native,facebook/react-native,facebook/react-native