Revert "make anchor_mode default"

This reverts commit e1c5ecc.

Author: cvanelteren

ultraplot/axes/cartesian.py

@@ -825,7 +825,6 @@ def _update_rotation(self, s, *, rotation=None):
             kw = {"rotation": rotation}
             if rotation not in (0, 90, -90):
                 kw["ha"] = "right" if rotation > 0 else "left"
-                kw["rotation_mode"] = "anchor"
             for label in axis.get_ticklabels():
                 label.update(kw)
             setattr(self, current, rotation)