Remove _get_episodes wrapper

With @flatten_list can use yield and @Retry together

plextraktsync/plex_api.py

@@ -400,14 +400,12 @@ def watch_progress(self, view_offset):
         percent = view_offset / self.item.duration * 100
         return percent
 
-    def episodes(self):
-        for ep in self._get_episodes():
-            yield PlexLibraryItem(ep, show=self.item, plex=self.plex)
-
     @nocache
     @retry()
-    def _get_episodes(self):
-        return self.item.episodes()
+    @flatten_list
+    def episodes(self):
+        for ep in self.item.episodes():
+            yield PlexLibraryItem(ep, show=self.item, plex=self.plex)
 
     @cached_property
     def season_number(self):