[glib/mcatanzaro/verify-chain-extra-check] gtlsdatabase: remove duplicate precondition check

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 855a22e1654eec57ce28292f12bac5bdb1a5717f
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Dec 7 11:11:37 2020 -0600

    gtlsdatabase: remove duplicate precondition check
    
    This check is the same as the check on the line above.

 gio/gtlsdatabase.c | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/gio/gtlsdatabase.c b/gio/gtlsdatabase.c
index 9341206f1..d7dcf4bbe 100644
--- a/gio/gtlsdatabase.c
+++ b/gio/gtlsdatabase.c
@@ -516,8 +516,6 @@ g_tls_database_verify_chain (GTlsDatabase           *self,
                              GError                **error)
 {
   g_return_val_if_fail (G_IS_TLS_DATABASE (self), G_TLS_CERTIFICATE_GENERIC_ERROR);
-  g_return_val_if_fail (G_IS_TLS_DATABASE (self),
-                        G_TLS_CERTIFICATE_GENERIC_ERROR);
   g_return_val_if_fail (G_IS_TLS_CERTIFICATE (chain),
                         G_TLS_CERTIFICATE_GENERIC_ERROR);
   g_return_val_if_fail (purpose, G_TLS_CERTIFICATE_GENERIC_ERROR);