Remove obsolete zeta-patch

The is identified in the comment as having been found in tests and in the PR as
being a port of something already merged upstream
#24019

so we should be able to drop it and if there were any issue
tests would fail

composer.json

@@ -302,10 +302,6 @@
       },
       "phpoffice/phpword": {
         "PHP8.1 fix for passing null value into strlen": "https://patch-diff.githubusercontent.com/raw/PHPOffice/PHPWord/pull/2272.patch"
-      },
-      "zetacomponents/mail": {
-        "CiviCRM Custom Patches for ZetaCompoents mail": "https://raw.githubusercontent.com/civicrm/civicrm-core/9d93748a36c7c5d44422911db1c98fb2f7067b34/tools/scripts/composer/patches/civicrm-custom-patches-zetacompoents-mail.patch",
-        "CiviCRM Custom patch to fix a php8.1 issue found in CiviCRM unit tests": "https://raw.githubusercontent.com/civicrm/civicrm-core/5506f4ce5d46799857b4f4ddf34069e7541e9cc5/tools/scripts/composer/zetacomponents-php-81-civicrm-custom.patch"
       }
     },
     "compile-includes": ["ext/greenwich/composer.compile.json"],