CUDA, HIP: Revert false support for LINKER_LAUNCHER

The implementation in commits 77312cc6 (CUDA: Add support for
[CMAKE_]CUDA_LINKER_LAUNCHER, 2025-05-30, v4.1.0-rc1~80^2~1) and
cdf2a36f (HIP: Add support for [CMAKE_]HIP_LINKER_LAUNCHER, 2025-05-30,
v4.1.0-rc1~80^2) is broken, and the tests are wrongly configured
so as to never actually run. Revert the entire feature to avoid future
confusion, including documented support.

Enable the test for Fortran, which was added but untested by commit
d176a8c5ce (Fortran: Add support for [CMAKE_]Fortran_LINKER_LAUNCHER,
2025-05-26, v4.1.0-rc1~96^2), and whose implementation works.

Issue: #26967

Help/prop_tgt/LANG_LINKER_LAUNCHER.rst

@@ -6,25 +6,13 @@
 This property is implemented only when ``<LANG>`` is one of:
 
 * ``C``
-
 * ``CXX``
-
-* ``CUDA``
-
-  .. versionadded:: 4.1
-
 * ``OBJC``
-
 * ``OBJCXX``
-
 * ``Fortran``
 
   .. versionadded:: 4.1
 
-* ``HIP``
-
-  .. versionadded:: 4.1
-
 Specify a :ref:`semicolon-separated list <CMake Language Lists>` containing a
 command line for a linker launching tool. The :ref:`Makefile Generators` and the
 :generator:`Ninja` generator will run this tool and pass the linker and its

Help/release/4.1.rst

@@ -21,7 +21,7 @@ Generators
 ----------
 
 * :ref:`Makefile Generators` and :ref:`Ninja Generators` gained support
-  for adding a linker launcher with ``Fortran``, ``CUDA``, and ``HIP``.
+  for adding a linker launcher with ``Fortran``.
   See the :variable:`CMAKE_<LANG>_LINKER_LAUNCHER` variable
   and :prop_tgt:`<LANG>_LINKER_LAUNCHER` target property for details.
 

Help/variable/CMAKE_LANG_LINKER_LAUNCHER.rst

@@ -11,10 +11,6 @@ This is done only when ``<LANG>`` is one of:
 
 * ``CXX``
 
-* ``CUDA``
-
-  .. versionadded:: 4.1
-
 * ``OBJC``
 
 * ``OBJCXX``
@@ -23,9 +19,5 @@ This is done only when ``<LANG>`` is one of:
 
   .. versionadded:: 4.1
 
-* ``HIP``
-
-  .. versionadded:: 4.1
-
 This variable is initialized to the :envvar:`CMAKE_<LANG>_LINKER_LAUNCHER`
 environment variable if it is set.