diff --git a/_includes/service_container/_my_mailer.rst.inc b/_includes/service_container/_my_mailer.rst.inc
deleted file mode 100644
index 01eafdfe87a..00000000000
--- a/_includes/service_container/_my_mailer.rst.inc
+++ /dev/null
@@ -1,33 +0,0 @@
-.. configuration-block::
-
-    .. code-block:: yaml
-
-        # config/services.yaml
-        services:
-            app.mailer:
-                class:        App\Mailer
-                arguments:    [sendmail]
-
-    .. code-block:: xml
-
-        <!-- config/services.xml -->
-        <?xml version="1.0" encoding="UTF-8" ?>
-        <container xmlns="http://symfony.com/schema/dic/services"
-            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-            xsi:schemaLocation="http://symfony.com/schema/dic/services
-                https://symfony.com/schema/dic/services/services-1.0.xsd">
-
-            <services>
-                <service id="app.mailer" class="App\Mailer">
-                    <argument>sendmail</argument>
-                </service>
-            </services>
-        </container>
-
-    .. code-block:: php
-
-        // config/services.php
-        use App\Mailer;
-
-        $container->register('app.mailer', Mailer::class)
-            ->addArgument('sendmail');
diff --git a/reference/forms/types/options/scale.rst.inc b/reference/forms/types/options/scale.rst.inc
deleted file mode 100644
index 0d2ec3d6dbc..00000000000
--- a/reference/forms/types/options/scale.rst.inc
+++ /dev/null
@@ -1,9 +0,0 @@
-``scale``
-~~~~~~~~~
-
-**type**: ``integer`` **default**: Locale-specific (usually around ``3``)
-
-This specifies how many decimals will be allowed until the field rounds
-the submitted value (via ``rounding_mode``). For example, if ``scale`` is set
-to ``2``, a submitted value of ``20.123`` will be rounded to, for example,
-``20.12`` (depending on your `rounding_mode`_).
diff --git a/security/_supportsToken.rst.inc b/security/_supportsToken.rst.inc
deleted file mode 100644
index e4403123a01..00000000000
--- a/security/_supportsToken.rst.inc
+++ /dev/null
@@ -1,10 +0,0 @@
-After Symfony calls ``createToken()``, it will then call ``supportsToken()``
-on your class (and any other authentication listeners) to figure out who should
-handle the token. This is just a way to allow several authentication mechanisms
-to be used for the same firewall (that way, you can for instance first try
-to authenticate the user via a certificate or an API key and fall back to
-a form login).
-
-Essentially, you need to make sure that this method returns ``true`` for a
-token that has been created by ``createToken()``. Your logic should probably
-look exactly like this example.