Fix copypasta in lifetime function descriptions
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index b18e220..83e941f 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -596,9 +596,8 @@
/** \brief Retrieve the lifetime of a key slot.
*
* The assignment of lifetimes to slots is implementation-dependent.
- * \param key Slot whose content is to be exported. This must
- * be an occupied key slot.
*
+ * \param key Slot to query.
* \param lifetime On success, the lifetime value.
*
* \retval PSA_SUCCESS
@@ -615,9 +614,8 @@
* whether the lifetime of an occupied key slot can be changed, is
* implementation-dependent.
*
- * \param key Slot whose content is to be exported. This must
- * be an occupied key slot.
- * \param lifetime The lifetime value to be set for the given key.
+ * \param key Slot whose lifetime is to be changed.
+ * \param lifetime The lifetime value to set for the given key slot.
*
* \retval PSA_SUCCESS
* Success.