Remove references for obsolete error code

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
diff --git a/library/psa_crypto_its.h b/library/psa_crypto_its.h
index 1535295..6d94730 100644
--- a/library/psa_crypto_its.h
+++ b/library/psa_crypto_its.h
@@ -99,7 +99,6 @@
  *
  * \retval      #PSA_SUCCESS                 The operation completed successfully
  * \retval      #PSA_ERROR_DOES_NOT_EXIST    The operation failed because the provided `uid` value was not found in the storage
- * \retval      #PSA_ERROR_INVALID_SIZE      The operation failed because the data associated with provided uid is larger than `data_size`
  * \retval      #PSA_ERROR_STORAGE_FAILURE   The operation failed because the physical storage has failed (Fatal error)
  * \retval      #PSA_ERROR_INVALID_ARGUMENT  The operation failed because one of the provided pointers(`p_data`, `p_data_length`)
  *                                           is invalid. For example is `NULL` or references memory the caller cannot access.