chore: remove verify_ccel_device example

Drop the device-only end-to-end verification example. It was useful
during development to confirm sha384(event)==digest and RTMR3 replay
against td10 on a real TDX CVM, but it lacks SPDX headers and pulls
tdx-attest/dcap-qvl into cc-eventlog dev-dependencies for a tool that
only runs inside a CVM.

Author: kvinwang

Cargo.lock

@@ -26,6 +26,4 @@ serde_json = { workspace = true, features = ["alloc"] }
 sha2.workspace = true
 
 [dev-dependencies]
-dcap-qvl.workspace = true
 insta.workspace = true
-tdx-attest.workspace = true