DOC remove MatplotlibDeprecationWarnings for `plot_gmm_sin.py` example (#24824)
DOC remove MatplotlibDeprecationWarnings for `plot_gmm_sin.py` example (#24824)


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