Merge branch '6.1' into 6.2

* 6.1:
  [Validator] Remove annotations from `exactly` option of Length constraint
  [HttpKernel] Remove old caution from Symony <4

Author: OskarStark

components/http_kernel.rst

@@ -136,13 +136,6 @@ See ":ref:`http-kernel-working-example`" for a more concrete implementation.
 For general information on adding listeners to the events below, see
 :ref:`http-kernel-creating-listener`.
 
-.. caution::
-
-    As of 3.1 the :class:`Symfony\\Component\\HttpKernel\\HttpKernel` accepts a
-    fourth argument, which must be an instance of
-    :class:`Symfony\\Component\\HttpKernel\\Controller\\ArgumentResolverInterface`.
-    In 4.0 this argument will become mandatory.
-
 .. seealso::
 
     There is a wonderful tutorial series on using the HttpKernel component and

reference/constraints/Length.rst

@@ -135,8 +135,7 @@ the given value's length is not **exactly** equal to this value.
 
     This option is the one being set by default when using the Length constraint
     without passing any named argument to it. This means that for example,
-    ``@Assert\Length(20)`` and ``@Assert\Length(exactly=20)`` are equivalent, as
-    well as ``#[Assert\Length(20)]`` and ``#[Assert\Length(exactly: 20)]``.
+    ``#[Assert\Length(20)]`` and ``#[Assert\Length(exactly: 20)]`` are equivalent.
 
 exactMessage
 ~~~~~~~~~~~~