Cleanup packages/dead imports (#625)

* Slim package

* Cleanup

* .

* Expose tokenID.

* Expose some constants.

* Open.

* Combine cleanup

* Make eraser base public.

* Reload

* Fix concurrency issue on key insertion.

* Add capabilities.

* .

* Revert "."

This reverts commit 7c5c2924fa.

* Revert "Add capabilities."

This reverts commit bfa7a3cd51.

Sources/SecretAgent/AppDelegate.swift

@@ -1,6 +1,5 @@
 import Cocoa
 import OSLog
-import Combine
 import SecretKit
 import SecureEnclaveSecretKit
 import SmartCardSecretKit
@@ -27,7 +26,6 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         let path = (NSHomeDirectory() as NSString).appendingPathComponent("socket.ssh") as String
         return SocketController(path: path)
     }()
-    private var updateSink: AnyCancellable?
     private let logger = Logger(subsystem: "com.maxgoedjen.secretive.secretagent", category: "AppDelegate")
 
     func applicationDidFinishLaunching(_ aNotification: Notification) {