conf: Fix ATTRIBUTE_NONNULL usages

Recent changes removed the virCapsPtr, but didn't adjust/remove the
corresponding ATTRIBUTE_NONNULL resulting in a build failure to build
in my Coverity environment.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/conf/domain_conf.h

@@ -3089,27 +3089,24 @@ unsigned int virDomainDefFormatConvertXMLFlags(unsigned int flags);
 char *virDomainDefFormat(virDomainDefPtr def,
                          virDomainXMLOptionPtr xmlopt,
                          unsigned int flags)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_NONNULL(3);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 char *virDomainObjFormat(virDomainObjPtr obj,
                          virDomainXMLOptionPtr xmlopt,
                          unsigned int flags)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_NONNULL(3);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 int virDomainDefFormatInternal(virDomainDefPtr def,
                                virDomainXMLOptionPtr xmlopt,
                                virBufferPtr buf,
                                unsigned int flags)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
+    ATTRIBUTE_NONNULL(3);
 int virDomainDefFormatInternalSetRootName(virDomainDefPtr def,
                                           virDomainXMLOptionPtr xmlopt,
                                           virBufferPtr buf,
                                           const char *rootname,
                                           unsigned int flags)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4)
-    ATTRIBUTE_NONNULL(5);
+    ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
 
 int virDomainDiskSourceFormat(virBufferPtr buf,
                               virStorageSourcePtr src,
@@ -3286,14 +3283,14 @@ int virDomainDefSave(virDomainDefPtr def,
                      const char *configDir)
     G_GNUC_WARN_UNUSED_RESULT
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
+    ATTRIBUTE_NONNULL(3);
 
 int virDomainObjSave(virDomainObjPtr obj,
                      virDomainXMLOptionPtr xmlopt,
                      const char *statusDir)
     G_GNUC_WARN_UNUSED_RESULT
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
-    ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
+    ATTRIBUTE_NONNULL(3);
 
 typedef void (*virDomainLoadConfigNotify)(virDomainObjPtr dom,
                                           int newDomain,