pythonPackages.azure-mgmt-network: remove patch (#59614)
The patched file has been removed in [0].
[0]: https://github.com/Azure/azure-sdk-for-python/commit/09b09a58396dd90c6316b52326371a45080a3bcf
(cherry picked from commit 6c6f13e9c4f8cb5751cb59e10ec0f7de2812a36e)
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