[ci skip] WIP - Close figures when computing metrics in skore_estimator_report_item

Author: thomass-dev

skore-remote-project/src/skore_remote_project/item/skore_estimator_report_item.py

@@ -6,7 +6,7 @@
 from typing import TYPE_CHECKING
 
 from joblib import hash as joblib_hash
-from matplotlib.pyplot import subplots
+from matplotlib.pyplot import close, subplots
 from sklearn.utils import estimator_html_repr
 
 from .item import ItemTypeError, lazy_is_instance
@@ -185,6 +185,7 @@ def mpl(self, name, category, **kwargs) -> Union[Representation, None]:
             display = function(**function_kwargs)
             figure, ax = subplots()
             display.plot(ax)
+            close(figure)
 
             item = MatplotlibFigureItem.factory(figure)