Fix issues ruff warned about

cozy/control/offline_cache.py

@@ -106,21 +106,21 @@ def remove(self, book: Book):
     def remove_all_for_storage(self, storage):
         for element in OfflineCacheModel.select().join(File).where(
                 storage.path in OfflineCacheModel.original_file.path):
-            file_path = os.path.join(self.cache_dir, element.cached_file)
+            file_path = self.cache_dir / element.cached_file
             if file_path == self.cache_dir:
                 continue
 
-            file = Gio.File.new_for_path(file_path)
+            file = Gio.File.new_for_path(str(file_path))
             if file.query_exists():
                 file.delete()
 
         OfflineCacheModel.delete().where(storage.path in OfflineCacheModel.original_file.path).execute()
 
-    def get_cached_path(self, chapter: Chapter):
+    def get_cached_path(self, chapter: Chapter) -> Path:
         query = OfflineCacheModel.select().where(OfflineCacheModel.original_file == chapter.file_id,
                                                  OfflineCacheModel.copied)
         if query.count() > 0:
-            return os.path.join(self.cache_dir, query.get().cached_file)
+            return self.cache_dir / query.get().cached_file
         else:
             return None
 

main.py

@@ -26,7 +26,6 @@
 import signal
 import sys
 import traceback
-from pathlib import Path
 
 import gi
 
@@ -37,7 +36,7 @@
 gi.require_version("GstController", "1.0")
 gi.require_version("GstPbutils", "1.0")
 
-from gi.repository import Gio, GLib
+from gi.repository import Gio
 
 from cozy.control.application_directories import get_data_dir