bug #15970 [Lock] Remove mention off DBAL Connection support for locking (johanadivare)

This PR was merged into the 6.3 branch.

Discussion
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[Lock] Remove mention off DBAL Connection support for locking

Fixes #15952 & #15950

Commits
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2802d22 [Lock] 15952 Remove mention off DBAL Connection support for locking

Author: OskarStark

components/lock.rst

@@ -518,13 +518,12 @@ MongoDB Connection String:
 PdoStore
 ~~~~~~~~
 
-The PdoStore saves locks in an SQL database. It is identical to DoctrineDbalStore
-but requires a `PDO`_ connection or a `Data Source Name (DSN)`_. This store does
-not support blocking, and expects a TTL to avoid stalled locks::
+The PdoStore saves locks in an SQL database. It requires a `PDO`_ connection or a `Data Source Name (DSN)`_. This store does not
+support blocking, and expects a TTL to avoid stalled locks::
 
     use Symfony\Component\Lock\Store\PdoStore;
 
-    // a PDO or DSN for lazy connecting through PDO
+    // a PDO instance or DSN for lazy connecting through PDO
     $databaseConnectionOrDSN = 'mysql:host=127.0.0.1;dbname=app';
     $store = new PdoStore($databaseConnectionOrDSN, ['db_username' => 'myuser', 'db_password' => 'mypassword']);
 
@@ -584,9 +583,8 @@ the :method:`Symfony\\Component\\Lock\\Store\\DoctrineDbalStore::save` method.
 PostgreSqlStore
 ~~~~~~~~~~~~~~~
 
-The PostgreSqlStore and DoctrineDbalPostgreSqlStore uses `Advisory Locks`_ provided by PostgreSQL.
-It is identical to DoctrineDbalPostgreSqlStore but requires `PDO`_ connection or
-a `Data Source Name (DSN)`_. It supports native blocking, as well as sharing
+The PostgreSqlStore uses `Advisory Locks`_ provided by PostgreSQL. It requires a
+`PDO`_ connection or a `Data Source Name (DSN)`_. It supports native blocking, as well as sharing
 locks::
 
     use Symfony\Component\Lock\Store\PostgreSqlStore;