[libsecret] secret-value: Don't annotate secret_value_unref as (allow-none)

[Debarshi Ray <debarshir src gnome org>]

commit b9151faaf00677fb53714874b26704ee89d5658a
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Jul 17 19:41:33 2017 +0200

    secret-value: Don't annotate secret_value_unref as (allow-none)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785034

 libsecret/secret-value.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libsecret/secret-value.c b/libsecret/secret-value.c
index af59a20..ca891cb 100644
--- a/libsecret/secret-value.c
+++ b/libsecret/secret-value.c
@@ -223,7 +223,7 @@ secret_value_ref (SecretValue *value)
 
 /**
  * secret_value_unref:
- * @value: (type Secret.Value) (allow-none): value to unreference
+ * @value: (type Secret.Value): value to unreference
  *
  * Unreference a #SecretValue. When the last reference is gone, then
  * the value will be freed.