fix(skills): remove duplicate homedir import

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/features/opencode-skill-loader/config-source-discovery.ts

@@ -1,7 +1,6 @@
 import { promises as fs } from "fs"
 import { homedir } from "os"
 import { dirname, extname, isAbsolute, join, relative } from "path"
-import { homedir } from "os"
 import picomatch from "picomatch"
 import type { SkillsConfig } from "../../config/schema"
 import { normalizeSkillsConfig } from "./merger/skills-config-normalizer"