fix: resolve lint errors (E741 ambiguous var, F401 unused import)

twitter_cli/auth.py

@@ -567,7 +567,7 @@ def get_cookies() -> Dict[str, str]:
         if hint:
             lines.append("")
             lines.append("Likely cause:")
-            lines.extend("  " + l for l in hint.splitlines())
+            lines.extend("  " + line for line in hint.splitlines())
             lines.append("")
         lines.append("Option 1: Set TWITTER_AUTH_TOKEN and TWITTER_CT0 environment variables")
         lines.append("Option 2: Make sure you are logged into x.com in your browser (Arc/Chrome/Edge/Firefox/Brave)")

twitter_cli/cli.py

@@ -1007,7 +1007,6 @@ def doctor(as_json, as_yaml):
         _diagnose_keychain_issues,
         _extract_in_process,
         _extract_via_subprocess,
-        extract_from_browser,
         load_from_env,
         verify_cookies,
     )