minor #15382 [Lock] Remove note about sharing the key (lyrixx)

This PR was merged into the 4.4 branch.

Discussion
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[Lock] Remove note about sharing the key

cc `@jderusse`

BTW: we say the opposing above in the doc :
https://symfony.com/doc/4.4/components/lock.html#serializing-locks

Commits
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2d96ae0 [Lock] Remove note about sharing the key

Author: javiereguiluz

components/lock.rst

@@ -486,12 +486,7 @@ Remote stores (:ref:`MemcachedStore <lock-store-memcached>`,
 :ref:`ZookeeperStore <lock-store-zookeeper>`) use a unique token to recognize
 the true owner of the lock. This token is stored in the
 :class:`Symfony\\Component\\Lock\\Key` object and is used internally by
-the ``Lock``, therefore this key must not be shared between processes (session,
-caching, fork, ...).
-
-.. caution::
-
-    Do not share a key between processes.
+the ``Lock``.
 
 Every concurrent process must store the ``Lock`` in the same server. Otherwise two
 different machines may allow two different processes to acquire the same ``Lock``.