Remove legacy Jetpack Social publicize code (#25747)

* Remove the socialSharingV2 feature flag

The Jetpack Social v2 experience is now always enabled.

* Remove the unreachable legacy social sharing UI from post settings

The v2 social sharing section fully shadows the legacy one: every
condition that produced legacy content also produces the v2 binding, and
PostSettings.sharing was already hardcoded to nil.

* Apply swift-format to files touched by Task 2

* Remove the legacy Publicize sharing management UI

The v2 connection management screen replaces SharingViewController
everywhere. The stats insights nudge now opens the v2 screen, and the
dashboard Jetpack Social card is removed along with its promo views.

* Apply swift-format ahead of the legacy publicize services removal

* Remove the legacy publicize services and remotes

Deletes the keyring-based connection sync (SharingSyncService), the
publicize half of SharingService/SharingServiceRemote, the share-limit
sync (Jetpack Social no longer has per-post share limits), and the
legacy publicize merge in PostHelper. The sharing-buttons half of both
services is kept. Also removes the now-orphaned
PublicizeInfo.configure(with:) helper in WordPressData, whose only
caller was the deleted JetpackSocialService.

* Apply swift-format ahead of the legacy publicize model removal

* Remove the unused socialIcon(for:) style helper

* Clean up leftover publicize references in comments and strings

Fixes two stale copy-paste comments in the sharing buttons service and
removes an unused Jetpack Social string from the pre-publishing sheet.

Author: crazytonyli

Modules/Sources/WordPressData/Blog+Extensions.swift

@@ -29,7 +29,8 @@ extension Blog {
         }
 
         // Add remaining formats sorted by their display names
-        let nonStandardFormats = postFormats
+        let nonStandardFormats =
+            postFormats
             .filter { $0.key != Blog.postFormatStandard }
             .sorted { $0.value.localizedCaseInsensitiveCompare($1.value) == .orderedAscending }
             .map { $0.key }

Modules/Sources/WordPressData/Swift/PublicizeInfo+CoreDataClass.swift

@@ -1,6 +1,5 @@
 import Foundation
 import CoreData
-import WordPressKit
 
 /// `PublicizeInfo` encapsulates the information related to Jetpack Social auto-sharing.
 ///
@@ -16,18 +15,11 @@ public class PublicizeInfo: NSManagedObject {
     }
 
     @nonobjc public class func fetchRequest() -> NSFetchRequest<PublicizeInfo> {
-        return NSFetchRequest<PublicizeInfo>(entityName: "PublicizeInfo")
+        NSFetchRequest<PublicizeInfo>(entityName: "PublicizeInfo")
     }
 
     @nonobjc public class func newObject(in context: NSManagedObjectContext) -> PublicizeInfo? {
-        return NSEntityDescription.insertNewObject(forEntityName: Self.entityName(), into: context) as? PublicizeInfo
-    }
-
-    public func configure(with remote: RemotePublicizeInfo) {
-        self.shareLimit = Int64(remote.shareLimit)
-        self.toBePublicizedCount = Int64(remote.toBePublicizedCount)
-        self.sharedPostsCount = Int64(remote.sharedPostsCount)
-        self.sharesRemaining = Int64(remote.sharesRemaining)
+        NSEntityDescription.insertNewObject(forEntityName: Self.entityName(), into: context) as? PublicizeInfo
     }
 
     /// A value-type representation for Publicize auto-sharing usage.