Remove scope creep/reduce diff size

Author: myieye

backend/FwLite/FwLiteWeb/FwLiteWebServer.cs

@@ -43,37 +43,6 @@ public static WebApplication SetupAppServer(WebApplicationOptions options, Actio
                 ..config.LexboxServers,
                 new(new("https://lexbox.org"), "Lexbox")
             ]);
-        var configuredCacheFile = builder.Configuration["Auth:CacheFileName"];
-        builder.Services.PostConfigure<AuthConfig>(config =>
-        {
-            //honour an explicitly configured cache path; only supply our default location otherwise.
-            if (!string.IsNullOrEmpty(configuredCacheFile)) return;
-
-            //stable per-user cache location. A binary-relative path is orphaned under Platform.Bible, which
-            //extracts each extension version to a versioned cache dir, so every update would log the user out.
-            var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
-            //GetFolderPath can return "" on a headless/container host with no HOME; fall back to the binary
-            //dir so the path stays fully qualified (BuildCacheProperties rejects relative paths).
-            var baseDir = string.IsNullOrEmpty(localAppData) ? AppContext.BaseDirectory : localAppData;
-            var cacheDir = Path.Combine(baseDir, "SIL", "FwLiteWeb");
-            Directory.CreateDirectory(cacheDir);
-            var cacheFile = Path.Combine(cacheDir, "msal.json");
-
-            var legacyCacheFile = Path.Combine(AppContext.BaseDirectory, "msal.json");
-            if (!File.Exists(cacheFile) && File.Exists(legacyCacheFile))
-            {
-                try
-                {
-                    File.Copy(legacyCacheFile, cacheFile);
-                }
-                catch
-                {
-                    //a failed migration just means one re-login; never break startup over it.
-                }
-            }
-
-            config.CacheFileName = cacheFile;
-        });
         builder.Services.Configure<FwLiteConfig>(config =>
         {
             config.AppVersion = VersionHelper.DisplayVersion(typeof(FwLiteWebServer).Assembly);