Remove deprecated services from Huawei LTE

[jpbede]

Breaking change

The services clear_traffic_statistics and reboot have been moved to button entities in release 2023.8. Support for the deprecated services has now been completely removed. If you are still using them, please adjust your automations and scripts.

Proposed change

Remove the in release 2023.8 deprecated services in huawei_lte completely

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
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[home-assistant]

Hey there @scop, @fphammerle, mind taking a look at this pull request as it has been labeled with an integration (huawei_lte) you are listed as a code owner for? Thanks!

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