fix(scripts): drop unused execFileSync imports

Signed-off-by: aoright <102943475+aoright@users.noreply.github.com>

scripts/validate-versions-test.js

@@ -1,7 +1,6 @@
 "use strict";
 
 const assert = require("node:assert/strict");
-const { execFileSync } = require("node:child_process");
 const { readFileSync } = require("node:fs");
 const test = require("node:test");
 

scripts/validate-versions.js

@@ -2,7 +2,6 @@
 
 "use strict";
 
-const { execFileSync } = require("node:child_process");
 const { readFileSync } = require("node:fs");
 
 const manifestPaths = [