Remove media patch, put usnLim in server code

Since dae/anki@d6874de8, usnLim always returns -1 regardless of the
`server` attribute.

Reference: d6874de8c8

ankisyncd/collection.py

@@ -49,7 +49,7 @@ class CollectionWrapper:
         # mkdir -p the path, because it might not exist
         os.makedirs(os.path.dirname(self.path), exist_ok=True)
 
-        col = anki.storage.Collection(self.path, server=True)
+        col = anki.storage.Collection(self.path)
 
         # Do any special setup
         if self.setup_new_collection is not None:
@@ -61,7 +61,7 @@ class CollectionWrapper:
         """Open the collection, or create it if it doesn't exist."""
         if self.__col is None:
             if os.path.exists(self.path):
-                self.__col = anki.storage.Collection(self.path, server=True)
+                self.__col = anki.storage.Collection(self.path)
             else:
                 self.__col = self.__create_collection()