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ARROW-9129: [Python][JPype] Remove JPype version check

Because we only run the test with the latest JPype.

Error details:

https://github.com/ursa-labs/crossbow/runs/769433714#step:6:7995

```text
>       if jpype.__version_info__ >= (0, 7):
E       TypeError: '>=' not supported between instances of 'list' and 'tuple'
```

Closes #7433 from kou/python-jpype-remove-version-check

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>