Remove configs not relevant to Fast Conformer-CTC

[MedAymenF]

What does this PR do ?

Removed "pred_hidden", "joint_hidden", and "pred_rnn_layers" because they are Fast Conformer-Transducer configs.

Collection: [ASR]

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• [ ] New Feature
• [ ] Bugfix
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[github-actions[bot]]

This PR is stale because it has been open for 14 days with no activity. Remove stale label or comment or update or this will be closed in 7 days.

[github-actions[bot]]

This PR is stale because it has been open for 14 days with no activity. Remove stale label or comment or update or this will be closed in 7 days.

[github-actions[bot]]

This PR was closed because it has been inactive for 7 days since being marked as stale.