Revert "Fix ENOENT error: create cache directory on startup"

This reverts commit ff0388d.

Author: winmin

packages/opencode/src/global/index.ts

@@ -31,7 +31,6 @@ await Promise.all([
   fs.mkdir(Global.Path.state, { recursive: true }),
   fs.mkdir(Global.Path.log, { recursive: true }),
   fs.mkdir(Global.Path.bin, { recursive: true }),
-  fs.mkdir(Global.Path.cache, { recursive: true }),
 ])
 
 const CACHE_VERSION = "14"