fix(sandbox): spawn confined argv directly (round 1)

packages/bash/bash-sandbox/src/helpers.ts

@@ -1,5 +1,5 @@
 /**
- * Internal shell-quoting and sandbox-result classification helpers.
+ * Internal sandbox-result classification helpers.
  *
  * @module @deepseek-ai/dsh-bash-sandbox/helpers
  */
@@ -13,15 +13,6 @@ interface RunnerFailureMatch {
   detail: string
 }
 
-/**
- * Quote one string as a single-quoted POSIX shell word.
- * @param text - raw argv element to preserve through the outer shell parse.
- * @returns the quoted shell word.
- */
-export function shellQuote(text: string): string {
-  return `'${text.replaceAll("'", String.raw`'\''`)}'`
-}
-
 /**
  * Classify a failed run against the selected backend's denial dialect.
  * @param result - settled foreground run.