refactor: keep root install as the sole installer source

test/onboarding/verify_install_entry.py

@@ -1,5 +1,5 @@
 #!/usr/bin/python3
-"""Opt-in real Bash installer acceptance in an owned image, without host services."""
+"""Opt-in root install acceptance in an owned image, without host services."""
 
 import argparse
 import hashlib
@@ -16,7 +16,7 @@ from verify_prepared_release import WORKSPACE, execute
 def verify(args):
     result = {
         "status": "running", "checks": [],
-        "transport": "local signed assets; actual generated Bash entry and Rust bootstrap",
+        "transport": "local signed assets; actual root Bash entry and Rust bootstrap",
         "online_install_and_update": "not_run",
         "entry_sha256": hashlib.sha256(args.entry.read_bytes()).hexdigest(),
     }