[dask] remove extra 'client' kwarg in DaskLGBMRegressor (#3906)
[dask] remove extra 'client' kwarg in DaskLGBMRegressor (#3906)


henry0312/LightGBM,microsoft/LightGBM,microsoft/LightGBM,microsoft/LightGBM,henry0312/LightGBM,microsoft/LightGBM,henry0312/LightGBM,henry0312/LightGBM,microsoft/LightGBM,henry0312/LightGBM