Issue #3335145 by catch, Berdir: Unnecessary workflow plugin manager cache tag

core/modules/workflows/src/WorkflowAccessControlHandler.php

@@ -76,8 +76,7 @@ protected function checkCreateAccess(AccountInterface $account, array $context,
     // Allow access if there is at least one workflow type. Since workflow types
     // are provided by modules this is cacheable until extensions change.
     return $admin_access
-      ->andIf(AccessResult::allowedIf($workflow_types_count > 0))
-      ->addCacheTags(['workflow_type_plugins']);
+      ->andIf(AccessResult::allowedIf($workflow_types_count > 0));
   }
 
 }

core/modules/workflows/src/WorkflowTypeManager.php

@@ -30,7 +30,7 @@ class WorkflowTypeManager extends DefaultPluginManager {
   public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
     parent::__construct('Plugin/WorkflowType', $namespaces, $module_handler, WorkflowTypeInterface::class, WorkflowType::class);
     $this->alterInfo('workflow_type_info');
-    $this->setCacheBackend($cache_backend, 'workflow_type_info', ['workflow_type_plugins']);
+    $this->setCacheBackend($cache_backend, 'workflow_type_info');
   }
 
 }

core/modules/workflows/tests/src/Kernel/WorkflowAccessControlHandlerTest.php

@@ -75,14 +75,12 @@ public function testCheckCreateAccess() {
     $this->assertEquals(
       AccessResult::neutral()
         ->addCacheContexts(['user.permissions'])
-        ->setReason("The 'administer workflows' permission is required.")
-        ->addCacheTags(['workflow_type_plugins']),
+        ->setReason("The 'administer workflows' permission is required."),
       $this->accessControlHandler->createAccess(NULL, $this->user, [], TRUE)
     );
     $this->assertEquals(
       AccessResult::allowed()
-        ->addCacheContexts(['user.permissions'])
-        ->addCacheTags(['workflow_type_plugins']),
+        ->addCacheContexts(['user.permissions']),
       $this->accessControlHandler->createAccess(NULL, $this->adminUser, [], TRUE)
     );
 
@@ -92,8 +90,7 @@ public function testCheckCreateAccess() {
     $this->accessControlHandler->resetCache();
     $this->assertEquals(
       AccessResult::neutral()
-        ->addCacheContexts(['user.permissions'])
-        ->addCacheTags(['workflow_type_plugins']),
+        ->addCacheContexts(['user.permissions']),
       $this->accessControlHandler->createAccess(NULL, $this->adminUser, [], TRUE)
     );
   }