Copypasta

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/library/pk.c b/library/pk.c
index 696e7e5..c32294d 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -553,7 +553,6 @@
                         return MBEDTLS_ERR_PK_TYPE_MISMATCH;
                     }
                     break;
-                    break;
                 default:
                     return MBEDTLS_ERR_PK_TYPE_MISMATCH;
             }