chore: remove unused WEAVIATE_GRPC_ENABLED config option (#33378)

Signed-off-by: majiayu000 <1835304752@qq.com>

api/.env.example

@@ -188,7 +188,6 @@ VECTOR_INDEX_NAME_PREFIX=Vector_index
 # Weaviate configuration
 WEAVIATE_ENDPOINT=http://localhost:8080
 WEAVIATE_API_KEY=WVF5YThaHlkYwhGUSmCRgsX3tD5ngdN8pkih
-WEAVIATE_GRPC_ENABLED=false
 WEAVIATE_BATCH_SIZE=100
 WEAVIATE_TOKENIZATION=word
 

api/configs/middleware/vdb/weaviate_config.py

@@ -17,11 +17,6 @@ class WeaviateConfig(BaseSettings):
         default=None,
     )
 
-    WEAVIATE_GRPC_ENABLED: bool = Field(
-        description="Whether to enable gRPC for Weaviate connection (True for gRPC, False for HTTP)",
-        default=True,
-    )
-
     WEAVIATE_GRPC_ENDPOINT: str | None = Field(
         description="URL of the Weaviate gRPC server (e.g., 'grpc://localhost:50051' or 'grpcs://weaviate.example.com:443')",
         default=None,

api/tests/integration_tests/.env.example

@@ -60,7 +60,6 @@ VECTOR_STORE=weaviate
 # Weaviate configuration
 WEAVIATE_ENDPOINT=http://localhost:8080
 WEAVIATE_API_KEY=WVF5YThaHlkYwhGUSmCRgsX3tD5ngdN8pkih
-WEAVIATE_GRPC_ENABLED=false
 WEAVIATE_BATCH_SIZE=100
 WEAVIATE_TOKENIZATION=word