Requester: Remove duplicated function (#97038)

* Remove duplicated function

* Remove GetDisplayName from interface

* Use GetName

pkg/services/navtree/navtreeimpl/navtree.go

@@ -262,7 +262,7 @@ func (s *ServiceImpl) addHelpLinks(treeRoot *navtree.NavTreeRoot, c *contextmode
 func (s *ServiceImpl) getProfileNode(c *contextmodel.ReqContext) *navtree.NavLink {
 	// Only set login if it's different from the name
 	var login string
-	if c.SignedInUser.GetLogin() != c.SignedInUser.GetDisplayName() {
+	if c.SignedInUser.GetLogin() != c.SignedInUser.GetName() {
 		login = c.SignedInUser.GetLogin()
 	}
 	gravatarURL := dtos.GetGravatarUrl(s.cfg, c.SignedInUser.GetEmail())
@@ -297,7 +297,7 @@ func (s *ServiceImpl) getProfileNode(c *contextmodel.ReqContext) *navtree.NavLin
 	}
 
 	return &navtree.NavLink{
-		Text:       c.SignedInUser.GetDisplayName(),
+		Text:       c.SignedInUser.GetName(),
 		SubTitle:   login,
 		Id:         "profile",
 		Img:        gravatarURL,