Remove implementation comment from API specification
*
* This is either #PSA_SUCCESS (which is zero), indicating success,
* or a nonzero value indicating that an error occurred. Errors are
- * encoded as one of the \c PSA_ERROR_xxx values defined here.
- * If #PSA_SUCCESS is already defined, it means that #psa_status_t
+ * encoded as one of the \c PSA_ERROR_xxx values defined here. */
+/* If #PSA_SUCCESS is already defined, it means that #psa_status_t
* is also defined in an external header, so prevent its multiple
* definition.
*/
