fix: remove json_mode and output_schema

[vasconceloscezar]

This PR removes the json_mode and output_schema parameters from the AIMLModel component. The changes include:

1. Removal of the json_mode Dictionary from the component definition.
2. Removal of the output_schema Dictionary from the component definition.
3. Deletion of the json_mode variable assignment in the build_model method.
4. Removal of the output_schema_dict variable and its usage in the build_model method.

These changes simplify the AIMLModel component by removing unused or redundant features. The PR aligns with issue #3385, which called for the removal of these parameters.

Importantly, this PR fixes errors related to unsupported features in AI ML. Specifically, it addresses the error:
"Error building Component Tool Calling Agent: AsyncCompletions.create() got an unexpected keyword argument 'json_mode'"

This error occurs because the AI ML component does not support the json_mode parameter, and removing it resolves this issue.

[github-actions]

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_{Last Modified at 16 Aug 24 15:01 UTC}

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