chore(@desktop/general): few warnings building the app removed

src/app/modules/startup/controller.nim

@@ -1,11 +1,10 @@
-import Tables, chronicles
+import chronicles
 
 import controller_interface
 import io_interface
 
 import ../../core/signals/types
 import ../../core/eventemitter
-import ../../../app_service/service/keychain/service as keychain_service
 import ../../../app_service/service/accounts/service_interface as accounts_service
 
 export controller_interface

src/app/modules/startup/onboarding/model.nim

@@ -1,4 +1,4 @@
-import NimQml, Tables, strutils, strformat
+import NimQml, Tables, strutils
 
 import item