Revert "feature #21038 [FrameworkBundle] deprecated cache:clear with warmup (fabpot)"

This reverts commit 3495b35e4fcdb2bf90b8aea443c1216c161dd469, reversing
changes made to 7f7b897ee275d4cbbd4284dbdd05f1d207699fac.

Author: nicolas-grekas

CHANGELOG.md

@@ -14,7 +14,6 @@ CHANGELOG
    the same helpers as the `Controller` class, but does not allow accessing the dependency
    injection container, in order to encourage explicit dependency declarations.
  * Added support for the `controller.service_arguments` tag, for injecting services into controllers' actions
- * Deprecated `cache:clear` with warmup (always call it with `--no-warmup`)
  * Changed default configuration for
    assets/forms/validation/translation/serialization/csrf from `canBeEnabled()` to
    `canBeDisabled()` when Flex is used

Command/CacheClearCommand.php

@@ -77,12 +77,6 @@ protected function execute(InputInterface $input, OutputInterface $output)
         if ($input->getOption('no-warmup')) {
             $filesystem->rename($realCacheDir, $oldCacheDir);
         } else {
-            $warning = 'Calling cache:clear without the --no-warmup option is deprecated since version 3.3. Cache warmup should be done with the cache:warmup command instead.';
-
-            @trigger_error($warning, E_USER_DEPRECATED);
-
-            $io->warning($warning);
-
             $this->warmupCache($input, $output, $realCacheDir, $oldCacheDir);
         }
 
@@ -132,8 +126,6 @@ private function warmupCache(InputInterface $input, OutputInterface $output, $re
      * @param string $warmupDir
      * @param string $realCacheDir
      * @param bool   $enableOptionalWarmers
-     *
-     * @internal to be removed in 4.0
      */
     protected function warmup($warmupDir, $realCacheDir, $enableOptionalWarmers = true)
     {
@@ -200,8 +192,6 @@ protected function warmup($warmupDir, $realCacheDir, $enableOptionalWarmers = tr
      * @param string          $warmupDir
      *
      * @return KernelInterface
-     *
-     * @internal to be removed in 4.0
      */
     protected function getTempKernel(KernelInterface $parent, $namespace, $parentClass, $warmupDir)
     {

Tests/Command/CacheClearCommand/CacheClearCommandTest.php

@@ -43,9 +43,6 @@ protected function tearDown()
         $this->fs->remove($this->rootDir);
     }
 
-    /**
-     * @group legacy
-     */
     public function testCacheIsFreshAfterCacheClearedWithWarmup()
     {
         $input = new ArrayInput(array('cache:clear'));