minor #8962 Fixed a merge error (javiereguiluz)

This PR was merged into the 3.3 branch.

Discussion
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Fixed a merge error

Commits
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4e026c7 Fixed a merge error

Author: javiereguiluz

service_container/3.3-di-changes.rst

@@ -626,13 +626,8 @@ Start by updating the service ids to class names:
 
     Services associated with global PHP classes (i.e. not using PHP namespaces)
     must maintain the ``class`` parameter. For example, when using the old Twig
-<<<<<<< HEAD
-    classes (e.g. ``Twig_Extensions_Extension_Intl`` instead of ``Twig\Extensions\IntlExtension``)
-    you can't redefine the service as `Twig_Extensions_Extension_Intl: ~` and
-=======
     classes (e.g. ``Twig_Extensions_Extension_Intl`` instead of ``Twig\Extensions\IntlExtension``),
     you can't redefine the service as ``Twig_Extensions_Extension_Intl: ~`` and
->>>>>>> upstream/3.3
     you must keep the original ``class`` parameter.
 
 But, this change will break our app! The old service ids (e.g. ``app.github_notifier``)