Revert "Fix loganalyzer.py UnicodeDecodeError issue"

[ZhaohuiS]

Reverts #6524.
Since the change sonic-net/sonic-buildimage#12425 was merged into internal branch. Revert this fix to make sure we can capture invalid format characters in syslog.

[azure-pipelines]

The pre-commit check detected issues in the files touched by this pull request.
The detected issues may be old or new. For new issues, please try to fix them.

For old issues, it is not mandatory to fix them because they were not caused by this change. It is unfair to blame
author of this pull request. But if you can take extra effort to fix the old issues as well, that would be great!

Detailed pre-commit check results:
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check for added large files..............................................Passed
check python ast.........................................................Passed
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

ansible/library/extract_log.py:76:1: E402 module level import not at top of file
ansible/library/extract_log.py:77:1: E402 module level import not at top of file
ansible/library/extract_log.py:78:1: E402 module level import not at top of file
ansible/library/extract_log.py:79:1: E402 module level import not at top of file
ansible/library/extract_log.py:80:1: E402 module level import not at top of file
ansible/library/extract_log.py:81:1: E402 module level import not at top of file
ansible/library/extract_log.py:82:1: E402 module level import not at top of file
ansible/library/extract_log.py:83:1: E402 module level import not at top of file
ansible/library/extract_log.py:84:1: E402 module level import not at top of file
ansible/library/extract_log.py:85:1: E402 module level import not at top of file
ansible/library/extract_log.py:86:1: F403 'from ansible.module_utils.basic import *' used; unable to detect undefined names
...
[truncated extra lines, please run pre-commit locally to view full check results]

To run the pre-commit checks locally, you can follow below steps:

1. Ensure that default python is python3. In sonic-mgmt docker container, default python is python2. You can run
   the check by activating the python3 virtual environment in sonic-mgmt docker container or outside of sonic-mgmt
   docker container.
2. Ensure that the pre-commit package is installed:

sudo pip install pre-commit

3. Go to repository root folder
4. Install the pre-commit hooks:

pre-commit install

5. Use pre-commit to check staged file:

pre-commit

6. Alternatively, you can check committed files using:

pre-commit run --from-ref <commit_id> --to-ref <commit_id>