Proposal: Remove tf.keras.optimizers.legacy imports for Keras 3 compatibility.

[SemanticZeus]

With the full transition to Keras 3, the tf.keras.optimizers.legacy.Adam (and similar) imports are no longer necessary and, in some environments, may cause dependency issues.

I propose globally replacing imports of tf.keras.optimizers.legacy.* with the standard tf.keras.optimizers.* (e.g., legacy.Adam -> Adam). This aligns DeepChem with the current Keras 3 API standard and should resolve compatibility hurdles.

[schrodingers-cat-T10]

hey i would like to work on it , can you assign it to me ?

[Aaditya-111]

Hello, I am interested in taking up this issue.
Please assign it to me if it’s still available.
If there are any specific requirements, guidelines, or testing steps I should follow, kindly let me know. Thank you.

[Impromptu55]

Hi, I’ve started working on this. I’ll open a PR soon 🙂