Remove redundant labels

doc/development/tutorials/recipe.rst

@@ -179,9 +179,9 @@ hook the various parts of our extension into Sphinx. Let's look at the
 This looks a little different to what we're used to seeing. There are no calls
 to :meth:`~Sphinx.add_directive` or even :meth:`~Sphinx.add_role`. Instead, we
 have a single call to :meth:`~Sphinx.add_domain` followed by some
-initialization of the :ref:`standard domain <domains-std>`. This is because we
-had already registered our directives, roles and indexes as part of the
-directive itself.
+initialization of the :doc:`standard domain </usage/domains/standard>`.
+This is because we had already registered our directives,
+roles and indexes as part of the directive itself.
 
 
 Using the extension

doc/tutorial/describing-code.rst

@@ -21,9 +21,9 @@ Documenting Python objects
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Sphinx offers several roles and directives to document Python objects,
-all grouped together in :ref:`the Python domain <python-domain>`. For example,
-you can use the :rst:dir:`py:function` directive to document a Python function,
-as follows:
+all grouped together in :doc:`the Python domain </usage/domains/python>`.
+For example, you can use the :rst:dir:`py:function` directive to document
+a Python function, as follows:
 
 .. code-block:: rst
    :caption: docs/source/usage.rst

doc/usage/domains/c.rst

@@ -1,7 +1,5 @@
 .. highlight:: rst
 
-.. _c-domain:
-
 The C Domain
 ------------
 

doc/usage/domains/cpp.rst

@@ -1,7 +1,5 @@
 .. highlight:: rst
 
-.. _cpp-domain:
-
 The C++ Domain
 --------------
 

doc/usage/domains/mathematics.rst

@@ -1,7 +1,5 @@
 .. highlight:: rst
 
-.. _math-domain:
-
 The Mathematics Domain
 ----------------------
 

doc/usage/domains/python.rst

@@ -1,7 +1,5 @@
 .. highlight:: rst
 
-.. _python-domain:
-
 The Python Domain
 -----------------
 

doc/usage/domains/standard.rst

@@ -1,7 +1,5 @@
 .. highlight:: rst
 
-.. _domains-std:
-
 The Standard Domain
 -------------------