diff --git a/lightrag/constants.py b/lightrag/constants.py
index 990adfb0..6fb9feb4 100644
--- a/lightrag/constants.py
+++ b/lightrag/constants.py
@@ -15,16 +15,6 @@ DEFAULT_SUMMARY_LANGUAGE = "English"  # Default language for document processing
 DEFAULT_MAX_GLEANING = 1
 DEFAULT_MAX_CHUNK_IDS_PER_ENTITY = 500 # Applies to Both Graph + Vector DBs
 
-DEFAULT_MAX_SOURCE_IDS_PER_ENTITY = 3
-DEFAULT_MAX_SOURCE_IDS_PER_RELATION = 3
-SOURCE_IDS_LIMIT_METHOD_KEEP = "KEEP"
-SOURCE_IDS_LIMIT_METHOD_FIFO = "FIFO"
-DEFAULT_SOURCE_IDS_LIMIT_METHOD = SOURCE_IDS_LIMIT_METHOD_KEEP
-VALID_SOURCE_IDS_LIMIT_METHODS = {
-    SOURCE_IDS_LIMIT_METHOD_KEEP,
-    SOURCE_IDS_LIMIT_METHOD_FIFO,
-}
-
 # Number of description fragments to trigger LLM summary
 DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE = 8
 # Max description token size to trigger LLM summary