Revert "Revert "mxs: remove 3.13""

This reverts commit b9703d07f90deb345f8a25f610a7ae96f09f1e2a.
Revert "Revert "Revert "mxs: remove 3.13"""

This reverts commit 5c37fefa2a96cf54082a129af56e4fef0d5474a2.