[7.0] Cleanup legacy code paths

Author: nicolas-grekas

RawMessage.php

@@ -43,8 +43,7 @@ public function toString(): string
     public function toIterable(): iterable
     {
         if ($this->isGeneratorClosed ?? false) {
-            trigger_deprecation('symfony/mime', '6.4', 'Sending an email with a closed generator is deprecated and will throw in 7.0.');
-            // throw new LogicException('Unable to send the email as its generator is already closed.');
+            throw new LogicException('Unable to send the email as its generator is already closed.');
         }
 
         if (\is_string($this->message)) {

Tests/RawMessageTest.php

@@ -12,13 +12,11 @@
 namespace Symfony\Component\Mime\Tests;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
+use Symfony\Component\Mime\Exception\LogicException;
 use Symfony\Component\Mime\RawMessage;
 
 class RawMessageTest extends TestCase
 {
-    use ExpectDeprecationTrait;
-
     /**
      * @dataProvider provideMessages
      */
@@ -65,18 +63,15 @@ public function testToIterable(mixed $messageParameter, bool $supportReuse)
 
     /**
      * @dataProvider provideMessages
-     *
-     * @group legacy
      */
     public function testToIterableLegacy(mixed $messageParameter, bool $supportReuse)
     {
         $message = new RawMessage($messageParameter);
         $this->assertEquals('some string', implode('', iterator_to_array($message->toIterable())));
 
         if (!$supportReuse) {
-            // in 7.0, the test with a generator will throw an exception
-            $this->expectDeprecation('Since symfony/mime 6.4: Sending an email with a closed generator is deprecated and will throw in 7.0.');
-            $this->assertEquals('some string', implode('', iterator_to_array($message->toIterable())));
+            $this->expectException(LogicException::class);
+            iterator_to_array($message->toIterable());
         }
     }