Move is_stateless_http_server metadata assignment to the Streamable route from the common metadata method.

tests/integration/mcp/test_mcp.py

@@ -2,7 +2,6 @@
 
 import os
 import uuid
-
 from resources.mcp.sse.client.main import run as mcp_sse_client_run
 from resources.mcp.stdio.client.main import run as mcp_stdio_client_run
 from resources.mcp.streamable.client.main import run as mcp_streamable_client_run
@@ -12,8 +11,6 @@ import httpx
 import pytest
 import requests
 
-from mcp.shared.exceptions import McpError
-
 # Taken from docker-compose.test.yml
 MCP_SSE_SERVER_HOST = "mcp-messenger-sse-server"
 MCP_SSE_SERVER_PORT = 8123