removePrompt method
Remove a previously registered prompt. Returns true when an entry was removed (the call is idempotent on missing names).
Implementation
@override
bool removePrompt(String name) {
final removed = _promptDefs.remove(name) != null;
try {
server.removePrompt(name);
} catch (_) {/* ignore — mcp_server raises when name is absent */}
return removed;
}