fix: add HTTP readiness check to wait_for_server and remove dead code in SSE tests#2073

Kludex merged 2 commits intomodelcontextprotocol:mainmodelcontextprotocol/python-sdk:mainfrom

BabyChrist666:fix/flaky-sse-tests-1777BabyChrist666/python-sdk:fix/flaky-sse-tests-1777Copy head branch name to clipboard