Remove leftover NEWSTART reference from helper script

CodexHelper/CodexHelper.sh

@@ -15,7 +15,7 @@ if [[ ! -f "${SYSTEM_PROMPT_PATH}" ]]; then
   exit 1
 fi
 
-# Binary detection per NEWSTART.md guidance
+# Binary detection: prefer $CODEX_BIN, then common names
 if [[ -n "${CODEX_BIN:-}" ]]; then
   BIN="${CODEX_BIN}"
 elif command -v codex >/dev/null 2>&1; then
@@ -30,4 +30,3 @@ fi
 # Try a common flag name for supplying a system prompt. Adjust if needed.
 # Additional args are forwarded so callers can customize behavior.
 exec "${BIN}" --system-prompt "${SYSTEM_PROMPT_PATH}" "$@"
-