diff --git a/dspy/utils/caching.py b/dspy/utils/caching.py
index b3bf5373c..22434d7b8 100644
--- a/dspy/utils/caching.py
+++ b/dspy/utils/caching.py
@@ -1,11 +1,5 @@
-from collections import OrderedDict
-from hashlib import sha256
 from pathlib import Path
-from typing import Union
 import os
-import pickle
-
-import ujson
 
 
 _DEFAULT_CACHE_DIR = os.path.join(Path.home(), ".dspy_cache")
@@ -18,58 +12,3 @@ def create_subdir_in_cachedir(subdir: str) -> str:
     subdir = os.path.abspath(subdir)
     os.makedirs(subdir, exist_ok=True)
     return subdir
-
-
-class LRUCache(OrderedDict):
-    maxsize: int
-
-    def __init__(self, iterable, maxsize: int):
-        super().__init__(iterable)
-        self.maxsize = maxsize
-
-    @classmethod
-    def load(cls, file, maxsize: int) -> "LRUCache":
-        return cls(pickle.load(file), maxsize)
-
-    @staticmethod
-    def dump(obj, file) -> None:
-        pickle.dump([[k, v] for k, v in obj.items()], file)
-
-    def __setitem__(self, request: dict, value):
-        key = self.cache_key(request)
-
-        if key in self:
-            self.move_to_end(key)
-            return
-
-        if len(self) == self.maxsize:
-            self.popitem(last=False)
-
-        super().__setitem__(key, value)
-
-    def __getitem__(self, request: dict):
-        key = self.cache_key(request)
-        return super().__getitem__(key)
-
-    def __contains__(self, request: dict):
-        key = self.cache_key(request)
-        return super().__contains__(key)
-
-    def get(self, request: dict, default=None):
-        key = self.cache_key(request)
-        return super().get(key, default)
-
-    def __delitem__(self, request: dict):
-        key = self.cache_key(request)
-        super().__delitem__(key)
-
-    def pop(self, request: dict, default=None):
-        key = self.cache_key(request)
-        return super().pop(key, default)
-
-    @staticmethod
-    def cache_key(request: Union[dict, str]) -> str:
-        params = request
-        if isinstance(request, dict):
-            params = {k: v for k, v in request.items() if not callable(v)}
-        return sha256(ujson.dumps(params, sort_keys=True).encode()).hexdigest()