Drop maintainer note from linalg API page

The "must stay in sync with __all__" note was for whoever edits the
file, not for users reading the rendered docs. The drift test in
`tests/tensor/linalg/test_doc_api.py` is the enforcement mechanism;
users don't need to know it exists.

Author: ricardoV94

doc/library/tensor/linalg.rst

@@ -9,15 +9,7 @@
    :synopsis: Linear Algebra Operations
 
 The :mod:`pytensor.tensor.linalg` module exposes the user-facing linear
-algebra API. Functions are grouped below by category, mirroring the
-internal organization under :mod:`pytensor.tensor._linalg`.
-
-.. note::
-   The grouping below must stay in sync with
-   :data:`pytensor.tensor.linalg.__all__`. A test in
-   ``tests/tensor/linalg/test_doc_api.py`` enforces this — if you add a
-   new function to ``__all__``, add it to the appropriate section here
-   (or vice-versa).
+algebra API.
 
 Constructors
 ============