Remove enterprise leftovers from community

crates/crank-community-mcp/src/app.rs

@@ -989,24 +989,18 @@ fn credential_allows_security_level(
 fn security_level_rank(level: OperationSecurityLevel) -> u8 {
     match level {
         OperationSecurityLevel::Standard => 0,
-        OperationSecurityLevel::Elevated => 1,
-        OperationSecurityLevel::Strict => 2,
     }
 }
 
 fn serialize_security_level(level: OperationSecurityLevel) -> &'static str {
     match level {
         OperationSecurityLevel::Standard => "standard",
-        OperationSecurityLevel::Elevated => "elevated",
-        OperationSecurityLevel::Strict => "strict",
     }
 }
 
 fn serialize_machine_access_mode(mode: crank_core::MachineAccessMode) -> &'static str {
     match mode {
         crank_core::MachineAccessMode::StaticAgentKey => "static_agent_key",
-        crank_core::MachineAccessMode::ShortLivedToken => "short_lived_token",
-        crank_core::MachineAccessMode::OneTimeToken => "one_time_token",
     }
 }