intersphinx: remove dual warning from role resolution

sphinx/ext/intersphinx.py

@@ -555,16 +555,10 @@ class IntersphinxRoleResolver(ReferencesResolver):
         for node in self.document.traverse(pending_xref):
             if 'intersphinx' in node:
                 contnode = cast(nodes.TextElement, node[0].deepcopy())
-                refdoc = node.get('refdoc', self.env.docname)
-                try:
-                    domain = self.env.get_domain(node['refdomain'])
-                except Exception:
-                    domain = None
-
                 newnode = missing_reference(self.app, self.env, node, contnode)
                 if newnode is None:
-                    self.warn_missing_reference(refdoc, node['reftype'], node['reftarget'],
-                                                node, domain)
+                    # no warning, the normal missing_reference handler will do that
+                    pass
                 else:
                     node.replace_self(newnode)