move validate_thumbnails out of startup has it's own schedule now

tubearchivist/home/apps.py

@@ -6,7 +6,6 @@ from django.apps import AppConfig
 from home.src.config import AppConfig as ArchivistConfig
 from home.src.helper import RedisArchivist
 from home.src.index_management import index_check
-from home.src.thumbnails import validate_thumbnails
 
 
 def sync_redis_state():
@@ -62,4 +61,3 @@ class HomeConfig(AppConfig):
         index_check()
         sync_redis_state()
         make_folders()
-        validate_thumbnails()