fix(api): do not catch gotenberg.ErrPdfEngineMethodNotSupported as it may hides other errors

pkg/modules/api/middlewares_test.go

@@ -38,11 +38,6 @@ func TestParseError(t *testing.T) {
 			expectStatus:  http.StatusTooManyRequests,
 			expectMessage: http.StatusText(http.StatusTooManyRequests),
 		},
-		{
-			err:           gotenberg.ErrPdfEngineMethodNotSupported,
-			expectStatus:  http.StatusNotImplemented,
-			expectMessage: http.StatusText(http.StatusNotImplemented),
-		},
 		{
 			err:           gotenberg.ErrPdfFormatNotSupported,
 			expectStatus:  http.StatusBadRequest,