Weaken preconditions for mbedtls[_internal]_sha1_process()
diff --git a/include/mbedtls/sha1.h b/include/mbedtls/sha1.h
index 2c4f0a6..38ea10b 100644
--- a/include/mbedtls/sha1.h
+++ b/include/mbedtls/sha1.h
@@ -176,8 +176,7 @@
  *                 constitutes a security risk. We recommend considering
  *                 stronger message digests instead.
  *
- * \param ctx      The SHA-1 context to use. This must be initialized
- *                 and have a hash operation started.
+ * \param ctx      The SHA-1 context to use. This must be initialized.
  * \param data     The data block being processed. This must be a
  *                 readable buffer of length \c 64 Bytes.
  *
@@ -256,8 +255,7 @@
  *
  * \deprecated     Superseded by mbedtls_internal_sha1_process() in 2.7.0.
  *
- * \param ctx      The SHA-1 context. This must be initialized and
- *                  have a hash operation started.
+ * \param ctx      The SHA-1 context. This must be initialized.
  * \param data     The data block being processed.
  *                 This must be a readable buffer of length \c 64 bytes.
  *