refactor: migrate from TypeScript to JavaScript for auth modules

src/cookie.js

@@ -147,25 +147,3 @@ export async function userHasValidCookie(username, cookieName) {
     return false;
   }
 }
-
-// Convert imported cookies (EditThisCookie format)
-export async function convertImportCookies(username) {
-  const cookieFilename = getCookiePath(username);
-  const fileExists = fs.existsSync(cookieFilename);
-  
-  if (fileExists) {
-    try {
-      const cookieData = fs.readFileSync(cookieFilename, 'utf8');
-      const cookieTest = JSON.parse(cookieData);
-      
-      if (Array.isArray(cookieTest)) {
-        // Convert from EditThisCookie format
-        const tcfsCookies = editThisCookieToToughCookieFileStore(cookieTest);
-        fs.writeFileSync(cookieFilename, JSON.stringify(tcfsCookies, null, 2));
-      }
-    } catch {
-      // Invalid format, delete file
-      fs.unlinkSync(cookieFilename);
-    }
-  }
-}