Remove Gremlin storage implementaion

lightrag/api/README-zh.md

@@ -303,7 +303,6 @@ NetworkXStorage      NetworkX(默认)
 Neo4JStorage         Neo4J
 PGGraphStorage       Postgres
 AGEStorage           AGE
-GremlinStorage       Gremlin
 ```
 
 * VECTOR_STORAGE 支持的实现名称

lightrag/api/README.md

@@ -314,7 +314,6 @@ NetworkXStorage      NetworkX(defualt)
 Neo4JStorage         Neo4J
 PGGraphStorage       Postgres
 AGEStorage           AGE
-GremlinStorage       Gremlin
 ```
 
 * VECTOR_STORAGE supported implement-name

lightrag/kg/__init__.py

@@ -16,7 +16,7 @@ STORAGE_IMPLEMENTATIONS = {
             # "MongoGraphStorage",
             # "TiDBGraphStorage",
             "AGEStorage",
-            "GremlinStorage",
+            # "GremlinStorage",
             "PGGraphStorage",
         ],
         "required_methods": ["upsert_node", "upsert_edge"],
@@ -62,7 +62,7 @@ STORAGE_ENV_REQUIREMENTS: dict[str, list[str]] = {
         "AGE_POSTGRES_USER",
         "AGE_POSTGRES_PASSWORD",
     ],
-    "GremlinStorage": ["GREMLIN_HOST", "GREMLIN_PORT", "GREMLIN_GRAPH"],
+    # "GremlinStorage": ["GREMLIN_HOST", "GREMLIN_PORT", "GREMLIN_GRAPH"],
     "PGGraphStorage": [
         "POSTGRES_USER",
         "POSTGRES_PASSWORD",
@@ -104,7 +104,7 @@ STORAGES = {
     "PGVectorStorage": ".kg.postgres_impl",
     "AGEStorage": ".kg.age_impl",
     "PGGraphStorage": ".kg.postgres_impl",
-    "GremlinStorage": ".kg.gremlin_impl",
+    # "GremlinStorage": ".kg.gremlin_impl",
     "PGDocStatusStorage": ".kg.postgres_impl",
     "FaissVectorDBStorage": ".kg.faiss_impl",
     "QdrantVectorDBStorage": ".kg.qdrant_impl",