Revert "Fixup after LruCache changes revert"

This reverts commit 9f82f66.

Author: MadLittleMods

synapse/util/caches/dictionary_cache.py

@@ -154,8 +154,7 @@ def __init__(self, *, max_entries: int, name: str, cache_manager: CacheManager):
         ] = LruCache(
             max_size=max_entries,
             cache_name=name,
-            # TODO
-            # cache_manager=cache_manager,
+            cache_manager=cache_manager,
             cache_type=TreeCache,
             size_callback=len,
         )