[dmitryduev]

wandb deprecated RunDisabled in v0.17.6 (wandb/wandb#8064): since then, wandb.init(mode="disabled") returns a regular no-op wandb.Run, and RunDisabled has been an empty compatibility shim that emits a deprecation warning on attribute access. The shim is being removed in an upcoming wandb release (wandb/wandb#12586), after which importing it raises ImportError.

This PR drops the remaining references so the integration keeps working with upcoming wandb releases, while remaining compatible with older ones.

Details:

• WandbLogger.experiment imports RunDisabled at runtime, so every WandbLogger user would crash once the class is removed from wandb.
• With older wandb (< 0.17.6, still allowed by the wandb>=0.12.10 requirement), disabled-mode stub runs no longer pass the isinstance gate before define_metric — that call was a no-op on those stubs anyway, so behavior is unchanged.
• Also removes the docs nitpick entry and the RunDisabled attribute from the wandb mock in tests_pytorch/loggers/conftest.py.

[dmitryduev]

Hey @tchaton @williamFalcon @justusschock @ethanwharris any chance to get this reviewed+merged? Thanks!