refactor(rector): drop unused catch variable in PdfSignatureDetectionService

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

lib/Service/PdfSignatureDetectionService.php

@@ -39,7 +39,7 @@ public function hasSignatures(string $pdfContent): bool {
 			$engine = $this->signEngineFactory->resolve('pdf');
 			$certificates = $engine->getCertificateChain($resource);
 			return !empty($certificates);
-		} catch (LibresignException $e) {
+		} catch (LibresignException) {
 			return false;
 		} catch (\Throwable $e) {
 			$this->logger->debug('Failed to detect signatures: ' . $e->getMessage());