Does using Grid Search eliminates the need for Train | Validate | Test split? Will Train | Validate suffice?

Question

Since the purpose of Train | Validate | Test is to overcome the issue of data leakage when tuning the model's hyperparameters after running an evaluation on the model, does Grid Search then eliminates the need for Train | Validate | Test? Will Train | Validate suffice?

Because Grid Search would already return the optimum hyperparamaters without users having to adjust the hyperparameters again. Hence, that makes the final left out test set redundant.