MAINT Remove -Wsign-compare when compiling sklearn.linear_model._cd_fast (#24895)
MAINT Remove -Wsign-compare when compiling sklearn.linear_model._cd_fast (#24895)

Co-authored-by: Guillaume Lemaitre <e5e78d384e205244ed69377c80930de68a2732ec@gmail.com>
betatim/scikit-learn,scikit-learn/scikit-learn,scikit-learn/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn,scikit-learn/scikit-learn