remove `<|endoftext|>`

My newly submitted [code](https://github.com/ggml-org/whisper.cpp/pull/3555) removes the mechanism of hard-coding glossaries to make them compatible with custom glossaries. However, the newly submitted code fails the [Ruby test](https://github.com/Jaffe2718/whisper.cpp/actions/runs/20052653983), and after my troubleshooting, it is not a problem with the code, but a special token `<|endoftext|>` in the English ggml model vocabulary, which caused the calculation of [positioning](https://github.com/Jaffe2718/whisper.cpp/blob/master/src/whisper.cpp#L1621-L1631) of the ID of the special token to be wrong. Similar to https://github.com/ggml-org/whisper.cpp/pull/725, remove special token in English model. These models are transformed using my [modified script](https://github.com/Jaffe2718/whisper.cpp/blob/master/models/convert-h5-to-ggml.py), and after my testing, it is compatible with whisper.cpp current official latest version [v1.8.2](https://github.com/ggml-org/whisper.cpp/tree/v1.8.2). It is necessary to remove special tags from the glossary from the perspective of code correctness, so I hope your team will adopt this pull request.

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