DOC remove MatplotlibDeprecationWarnings for plot_iris_dataset example (#24813)
DOC remove MatplotlibDeprecationWarnings for plot_iris_dataset example (#24813)


vinayak-mehta/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn,espg/scikit-learn,espg/scikit-learn,vinayak-mehta/scikit-learn,espg/scikit-learn,vinayak-mehta/scikit-learn,scikit-learn/scikit-learn,espg/scikit-learn,scikit-learn/scikit-learn,betatim/scikit-learn,vinayak-mehta/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn