Revert "fix: instrument httpx client at module level for MCP context"

This reverts commit 48cb4be4cd.

src/basic_memory/mcp/async_client.py

@@ -38,15 +38,3 @@ def create_client() -> AsyncClient:
 
 # Create shared async client
 client = create_client()
-
-# Instrument client for distributed tracing when in cloud mode
-# This must happen AFTER client creation and works in both MCP and API contexts
-config = ConfigManager().config
-if config.cloud_mode_enabled:
-    try:
-        import logfire  # pyright: ignore[reportMissingImports]
-
-        logger.info("Cloud mode: instrumenting httpx client for distributed tracing")
-        logfire.instrument_httpx(client=client)
-    except ImportError:
-        logger.warning("logfire not available - skipping httpx instrumentation")