feat: remove the fastmcp patch

change merged to upstream: PrefectHQ/fastmcp#2531

Author: wzxxing

mcp_proxy_for_aws/__init__.py

@@ -16,8 +16,6 @@
 
 from importlib.metadata import version as _metadata_version
 
-import mcp_proxy_for_aws.fastmcp_patch as _fastmcp_patch
-
 
 __all__ = ['__version__']
 __version__ = _metadata_version('mcp-proxy-for-aws')