Written to satisfy "an in-process MCP client can call the tools", but
its dependency (reqwest 0.13 via rmcp's client-http feature) pulled in
a very heavy native build (aws-lc-rs) that hadn't finished verifying
when told to stop building. Removing rather than leaving an unverified
test + dependency in the tree. The acceptance criterion it targeted is
still exercised at the unit level: http_transport::tests (loopback
bind/refusal) and mcp::scope::tests (tool-handler scope logic) both
pass under --features mcp; the full wire-protocol round trip is a
follow-up (see final report).