Revert "Fix offline client reconnecting as a microsoft account"

Could no longer reproduce said issue without this code, and a bug was reported regarding this change, so reverting it.
This reverts commit 873bd79.

MinecraftClient/Program.cs

@@ -411,7 +411,7 @@ private static void InitializeClient()
             ProtocolHandler.LoginResult result = ProtocolHandler.LoginResult.LoginRequired;
 
             string loginLower = ToLowerIfNeed(InternalConfig.Account.Login);
-            if (InternalConfig.Account.Password == "-" || InternalConfig.Account.Password == string.Empty)
+            if (InternalConfig.Account.Password == "-")
             {
                 ConsoleIO.WriteLineFormatted("§8" + Translations.mcc_offline, acceptnewlines: true);
                 result = ProtocolHandler.LoginResult.Success;