Remove stylelint less component task.

This has been removed in core in MDL-64506 (3.7).

Author: kabalin

src/Command/GruntCommand.php

@@ -33,7 +33,7 @@ protected function configure(): void
     {
         parent::configure();
 
-        $tasks = ['amd', 'yui', 'gherkinlint', 'stylelint:css', 'stylelint:less', 'stylelint:scss'];
+        $tasks = ['amd', 'yui', 'gherkinlint', 'stylelint:css', 'stylelint:scss'];
 
         $this->setName('grunt')
             ->setDescription('Run Grunt task on a plugin')
@@ -196,8 +196,6 @@ public function toGruntTask(string $task): ?GruntTaskModel
                 return new GruntTaskModel($task, $this->moodle->directory);
             case 'stylelint:css':
                 return $this->plugin->hasFilesWithName('*.css') ? $defaultTaskPluginDir : null;
-            case 'stylelint:less':
-                return $this->plugin->hasFilesWithName('*.less') ? $defaultTaskPluginDir : null;
             case 'stylelint:scss':
                 return $this->plugin->hasFilesWithName('*.scss') ? $defaultTaskPluginDir : null;
             default:

tests/Command/GruntCommandTest.php

@@ -145,7 +145,6 @@ public function testToGruntTaskWithStyles()
         $this->fs->remove($this->pluginDir . '/styles.css');
 
         $this->assertNull($command->toGruntTask('stylelint:css'));
-        $this->assertNull($command->toGruntTask('stylelint:less'));
         $this->assertNull($command->toGruntTask('stylelint:scss'));
     }