mod_adhoc_oauth2_client: Fix including final client_id in result form The client_id is composed of the details needed for retrieving the data, making it redundant to include in the data, albeit somewhat convenient sometimes. Decided to remove it anyways, but forgot to change the result.

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labels:
- Statistics
summary: Collect statistics on user registration
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Description
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This module measures the rate at which users register on the server (through
providers like `mod_register_ibr` or `mod_register_web`).