Merge pull request modelcontextprotocol#652 from modelcontextprotocol/basil/remove_batching_strays

remove vestigial batching language and datatypes

Author: ihrpr

docs/specification/draft/basic/lifecycle.mdx

@@ -72,12 +72,6 @@ The client **MUST** initiate this phase by sending an `initialize` request conta
 }
 ```
 
-The initialize request **MUST NOT** be part of a JSON-RPC
-[batch](https://www.jsonrpc.org/specification#batch), as other requests and notifications
-are not possible until initialization has completed. This also permits backwards
-compatibility with prior protocol versions that do not explicitly support JSON-RPC
-batches.
-
 The server **MUST** respond with its own capabilities and information:
 
 ```json

schema/draft/schema.json

@@ -6,20 +6,8 @@
 export type JSONRPCMessage =
   | JSONRPCRequest
   | JSONRPCNotification
-  | JSONRPCBatchRequest
   | JSONRPCResponse
-  | JSONRPCError
-  | JSONRPCBatchResponse;
-
-/**
- * A JSON-RPC batch request, as described in https://www.jsonrpc.org/specification#batch.
- */
-export type JSONRPCBatchRequest = (JSONRPCRequest | JSONRPCNotification)[];
-
-/**
- * A JSON-RPC batch response, as described in https://www.jsonrpc.org/specification#batch.
- */
-export type JSONRPCBatchResponse = (JSONRPCResponse | JSONRPCError)[];
+  | JSONRPCError;
 
 export const LATEST_PROTOCOL_VERSION = "DRAFT-2025-v2";
 export const JSONRPC_VERSION = "2.0";