refactor(pr): rely on selected CLI for PR creation

src/pr.ts

@@ -124,50 +124,6 @@ export async function getRemoteHostname(): Promise<string | null> {
   }
 }
 
-export function checkCLI(platform: Platform): string | null {
-  const bin =
-    platform === "github" ? "gh" : platform === "gitlab" ? "glab" : "tea";
-  const path = Bun.which(bin);
-  if (!path) {
-    if (platform === "github") {
-      return "GitHub CLI (gh) not found. Install: brew install gh";
-    }
-    if (platform === "gitlab") {
-      return "GitLab CLI (glab) not found. Install: brew install glab";
-    }
-    return "Gitea CLI (tea) not found. Install from: https://gitea.com/gitea/tea";
-  }
-  return null;
-}
-
-export async function checkAuth(platform: Platform): Promise<string | null> {
-  if (platform === "github") {
-    try {
-      await Bun.$`gh auth status`.quiet();
-      return null;
-    } catch {
-      return "Not authenticated with GitHub CLI. Run: gh auth login";
-    }
-  }
-
-  if (platform === "gitlab") {
-    try {
-      await Bun.$`glab auth status`.quiet();
-      return null;
-    } catch {
-      return "Not authenticated with GitLab CLI. Run: glab auth login";
-    }
-  }
-
-  try {
-    const result = await Bun.$`tea logins list`.quiet().text();
-    if (result.trim()) return null;
-    return "Not authenticated with Gitea CLI. Run: tea login add";
-  } catch {
-    return "Not authenticated with Gitea CLI. Run: tea login add";
-  }
-}
-
 export async function createPR(
   platform: Platform,
   title: string,