[gnome-online-accounts/wip/rishi/port-to-g-declare] identity: Use G_DECLARE_INTERFACE

[Debarshi Ray <debarshir src gnome org>]

commit f46bca707d1f880e4c41c3bacb5f29745907213a
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Dec 6 17:03:34 2019 +0100

    identity: Use G_DECLARE_INTERFACE
    
    https://gitlab.gnome.org/GNOME/gnome-online-accounts/merge_requests/40

 src/goaidentity/goaidentity.h | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/src/goaidentity/goaidentity.h b/src/goaidentity/goaidentity.h
index 9b79c317..0212cd22 100644
--- a/src/goaidentity/goaidentity.h
+++ b/src/goaidentity/goaidentity.h
@@ -24,13 +24,9 @@
 
 G_BEGIN_DECLS
 #define GOA_TYPE_IDENTITY             (goa_identity_get_type ())
-#define GOA_IDENTITY(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GOA_TYPE_IDENTITY, GoaIdentity))
-#define GOA_IDENTITY_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GOA_TYPE_IDENTITY, 
GoaIdentityInterface))
-#define GOA_IS_IDENTITY(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GOA_TYPE_IDENTITY))
-#define GOA_IDENTITY_GET_IFACE(obj)   (G_TYPE_INSTANCE_GET_INTERFACE((obj), GOA_TYPE_IDENTITY, 
GoaIdentityInterface))
+G_DECLARE_INTERFACE (GoaIdentity, goa_identity, GOA, IDENTITY, GObject);
+
 #define GOA_IDENTITY_ERROR            (goa_identity_error_quark ())
-typedef struct _GoaIdentity GoaIdentity;
-typedef struct _GoaIdentityInterface GoaIdentityInterface;
 
 struct _GoaIdentityInterface
 {
@@ -62,7 +58,6 @@ typedef enum
   GOA_IDENTITY_SIGN_IN_FLAGS_DISALLOW_PROXYING           = 1 << 2
 } GoaIdentitySignInFlags;
 
-GType  goa_identity_get_type    (void);
 GQuark goa_identity_error_quark (void);
 
 const char  *goa_identity_get_identifier            (GoaIdentity *identity);