minor #12511 [Mailer][Mime] Address::fromString() is not available in 4.3 (ogizanagi)

This PR was merged into the 4.3 branch.

Discussion
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[Mailer][Mime] Address::fromString() is not available in 4.3

It was added in #12128 (4.4)

So beware this change should not be merged up. Only merged to 4.3.

Commits
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48c0100 [Mailer] Address::fromString() is not available in 4.3

Author: javiereguiluz

mailer.rst

@@ -150,10 +150,6 @@ both strings or address objects::
         // (email clients will display the name)
         ->from(new NamedAddress('fabien@example.com', 'Fabien'))
 
-        // defining the email address and name as a string
-        // (the format must match: 'Name <email@example.com>')
-        ->from(Address::fromString('Fabien Potencier <fabien@example.com>'))
-
         // ...
     ;