tools: remove out-of-date code-cache-path comment

This commit removes the comment in cache_builder.cc regarding the usage
of --code-cache-path with configure.

Commit 14df42fd008ef8e95d60d0d70084943d180bab91 ("build: run
`mkcodecache` as an action") deprecated this option and it is always
set to yes (unless cross compiling).

PR-URL: https://github.com/nodejs/node/pull/28419
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

tools/code_cache/cache_builder.cc

@@ -73,8 +73,7 @@ static std::string GenerateCodeCache(
   ss << R"(#include <cinttypes>
 #include "node_native_module_env.h"
 
-// This file is generated by tools/mkcodecache
-// and is used when configure is run with \`--code-cache-path\`
+// This file is generated by mkcodecache (tools/code_cache/mkcodecache.cc)
 
 namespace node {
 namespace native_module {