[ISSUE] `backblaze-b2` package is broken and outdated

[kartikynwa <kartikynwa@users.noreply.github.com>]

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New issue by kartikynwa on void-packages repository

https://github.com/void-linux/void-packages/issues/37484

Description:
### System

* xuname:  
  `Void 5.15.45_1 x86_64 AuthenticAMD uptodate rrmFFFF`
* package:  
  `backblaze-b2-2.1.0_2`

### Expected behavior

Should be able to run

### Actual behavior

Raises a module not found error:

```
 ❯ backblaze-b2
Traceback (most recent call last):
  File "/bin/backblaze-b2", line 33, in <module>
    sys.exit(load_entry_point('b2==2.1.0', 'console_scripts', 'b2')())
  File "/bin/backblaze-b2", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/usr/lib/python3.10/site-packages/b2/console_tool.py", line 25, in <module>
    from class_registry import ClassRegistry
ModuleNotFoundError: No module named 'class_registry'
```

### Steps to reproduce the behavior

1. Install the package: `xbps-install -S backblaze-b2`
2. Run the executable: `backblaze-b2`

I would update the package but I don't want to maintain it. The package can be removed if the maintainers see it fit.