DOC remove Matplotlib warning in plot_varimax_fa example (#24397)
DOC remove Matplotlib warning in plot_varimax_fa example (#24397)

Co-authored-by: Loïc Estève <b4f57ceb208f2c5eae4e1192d707c3466a564837@ymail.com>
lesteve/scikit-learn,scikit-learn/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,anntzer/scikit-learn,lesteve/scikit-learn,espg/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn,scikit-learn/scikit-learn,lesteve/scikit-learn,manhhomienbienthuy/scikit-learn,TomDLT/scikit-learn,betatim/scikit-learn,vinayak-mehta/scikit-learn,TomDLT/scikit-learn,manhhomienbienthuy/scikit-learn,scikit-learn/scikit-learn,manhhomienbienthuy/scikit-learn,TomDLT/scikit-learn,manhhomienbienthuy/scikit-learn,anntzer/scikit-learn,vinayak-mehta/scikit-learn,espg/scikit-learn,espg/scikit-learn,lesteve/scikit-learn,espg/scikit-learn,vinayak-mehta/scikit-learn,anntzer/scikit-learn,TomDLT/scikit-learn,anntzer/scikit-learn,vinayak-mehta/scikit-learn