User::isBlocked, User::isBlockedFrom, User::blockedFor were soft deprecated and now need to be hard deprecated. So we need to remove using from the extensions and skins:
**WMF deployed**
[] extensions / Wikibase
[] extensions / CodeReview
[] extensions / UrlShortener
[] extensions / OAuth
[] extensions / VisualEditor
[] extensions / Renameuser
[] extensions / NewUserMessage
[] extensions / GWToolset
[x] extensions / Babel
**not WMF deployed**
[] extensions / SocialProfile
[] extensions / Survey
[x] extensions / ArticleFeedbackv5
[] extensions / WikiLexicalData
[x] extensions / Comments
[x] extensions / PollNY
[] extensions / RegexBlock
[] extensions / LinkFilter
[] extensions / UserStatus
[] extensions / BlueSpicePermissionManager
[] extensions / EditAccount
[] extensions / MassEditRegex
[] extensions / MediaWikiChat
[x] extensions / Report
[] extensions / Translate
[] extensions / BlogPage
[] extensions / BlueSpiceEchoConnector
[] extensions / InteractiveBlockMessage
[] extensions / Challenge
[] extensions / GraphViz
[] extensions / HAWelcome
[] extensions / ImportFreeImages
[] extensions / LastUserLogin
[] extensions / LDAPSyncAll
[] extensions / Maintenance
[] extensions / NewUserActions
[x] extensions / PageForms
[] extensions / Patroller
[] extensions / Petition
[] extensions / Poll
[] extensions / PrivateDomains
[] extensions / QuizGame
[] extensions / RefreshSpecial
[] extensions / RevisionCommentSupplement
[] extensions / SiteSettings
[] extensions / TinyMCE
[] extensions / WikiForum
[] extensions / Form
[] extensions / ConfirmAccount
[] extensions / OpenID
[] skins / Nimbus