Rollback renaming :nosignatures: to :no-signatures:

Since we introduced the more general ``:signatures: none` spelling,
we can directly push people in this direction.

Author: timhoffm

doc/usage/extensions/autosummary.rst

@@ -115,7 +115,6 @@ The :mod:`sphinx.ext.autosummary` extension does this in two parts:
       .. versionadded:: 8.2
 
    .. rst:directive:option:: nosignatures
-   .. rst:directive:option:: no-signatures
 
       Do not show function signatures in the summary.
 
@@ -125,10 +124,9 @@ The :mod:`sphinx.ext.autosummary` extension does this in two parts:
 
       .. versionchanged:: 8.2
 
-         The directive option ``:nosignatures:`` was renamed to ``:no-signatures:``.
+         The directive option is superseded by the more general ``:signatures: none``.
 
-         The previous name has been retained as an alias,
-         but will be deprecated and removed
+         It will be deprecated and removed
          in a future version of Sphinx.
 
    .. rst:directive:option:: template: filename

sphinx/ext/autosummary/__init__.py

@@ -11,7 +11,7 @@
 The autosummary directive has the form::
 
     .. autosummary::
-       :no-signatures:
+       :signatures: none
        :toctree: generated/
 
        module.function_1
@@ -237,20 +237,13 @@ class Autosummary(SphinxDirective):
         'caption': directives.unchanged_required,
         'class': directives.class_option,
         'toctree': directives.unchanged,
-        'no-signatures': directives.flag,
+        'nosignatures': directives.flag,
         'recursive': directives.flag,
         'signatures': directives.unchanged,
         'template': directives.unchanged,
-        'nosignatures': directives.flag,
     }
 
     def run(self) -> list[Node]:
-        # Copy the old option name to the new one
-        # xref RemovedInSphinx90Warning
-        # deprecate nosignatures in Sphinx 9.0
-        if 'no-signatures' not in self.options and 'nosignatures' in self.options:
-            self.options['no-signatures'] = self.options['nosignatures']
-
         self.bridge = DocumenterBridge(
             self.env, self.state.document.reporter, Options(), self.lineno, self.state
         )

tests/roots/test-ext-autosummary-ext/index.rst

@@ -1,6 +1,6 @@
 
 .. autosummary::
-   :no-signatures:
+   :signatures: none
    :toctree:
 
    dummy_module