code: public function execute()
      {
          $result = $this->resultJson->create();
  
          try {
              $activeVersion = $this->getRequest()->getParam('active_version');
              $snippet = $this->getRequest()->getParam('snippet_id');
              $activateVcl = $this->getRequest()->getParam('activate_flag');
              $service = $this->api->checkServiceDetails();
              $this->vcl->checkCurrentVersionActive($service->versions, $activeVersion);
              $currActiveVersion = $this->vcl->getCurrentVersion($service->versions);
  
              $write = $this->filesystem->getDirectoryWrite(DirectoryList::VAR_DIR);
              $snippetPath = $write->getRelativePath(Config::CUSTOM_SNIPPET_PATH . $snippet);
  
              $snippetName = explode('_', $snippet);
              $snippetName = explode('.', $snippetName[2]);
  
              $reqName = Config::FASTLY_MAGENTO_MODULE . '_' . $snippetName[0];
              $checkIfSnippetExist = $this->api->hasSnippet($activeVersion, $reqName);
  
              if ($checkIfSnippetExist) {
                  $clone = $this->api->cloneVersion($currActiveVersion);
                  $this->api->removeSnippet($clone->number, $reqName);
                  $this->api->validateServiceVersion($clone->number);
  
                  if ($activateVcl === 'true') {
                      $this->api->activateVersion($clone->number);
                  }
  
                  $comment = ['comment' => 'Magento Module deleted the ' . $reqName . ' custom snippet.'];
                  $this->api->addComment($clone->number, $comment);
              }
  
              if ($write->isExist($snippetPath)) {
                  $write->delete($snippetPath);
              }
  
              return $result->setData([
                  'status'    => true
              ]);
          } catch (\Exception $e) {
              return $result->setData([
                  'status'    => false,
                  'msg'       => $e->getMessage()
              ]);
          }
      }
docs: Deletes the specified custom snippet VCL file
  
  @return $this|\Magento\Framework\App\ResponseInterface|\Magento\Framework\Controller\ResultInterface