Drop scikit-learn-intelex: very low usage and NumPy 2.4 compat issues

Per reviewer feedback, scikit-learn-intelex has <5 daily users and has
been causing persistent installation issues with NumPy 2.4. Users who
need it can pip install it themselves.

Author: stevemessick

kaggle_requirements.txt

@@ -108,8 +108,6 @@ ray
 rgf-python
 s3fs
 scikit-learn
-# Scikit-learn accelerated library for x86
-scikit-learn-intelex>=2025.10.1
 scikit-multilearn
 scikit-optimize
 scikit-plot