Remove on-premise Supabase test code

Remove code related to on-premise Supabase testing.

src/components/auth/ServerStatusAlert.tsx

@@ -1,45 +0,0 @@
-
-import React from "react";
-import { RefreshCcw } from "lucide-react";
-import { Button } from "@/components/ui/button";
-import { Alert, AlertTitle, AlertDescription } from "@/components/ui/alert";
-
-interface ServerStatusAlertProps {
-  serverStatus: {
-    checked: boolean;
-    connected: boolean;
-    message: string;
-  };
-  checkServerConnection: () => Promise<void>;
-}
-
-const ServerStatusAlert: React.FC<ServerStatusAlertProps> = ({
-  serverStatus,
-  checkServerConnection,
-}) => {
-  if (!serverStatus.checked || serverStatus.connected) {
-    return null;
-  }
-
-  return (
-    <Alert variant="destructive" className="mb-6">
-      <AlertTitle className="flex items-center">
-        서버 연결 문제
-        <Button 
-          variant="ghost" 
-          size="sm" 
-          className="ml-2 h-6 w-6 p-0" 
-          onClick={checkServerConnection}
-        >
-          <RefreshCcw className="h-4 w-4" />
-        </Button>
-      </AlertTitle>
-      <AlertDescription>
-        {serverStatus.message}
-        <p className="mt-1 text-xs">회원가입을 시도하기 전에 서버 연결 문제를 해결해주세요.</p>
-      </AlertDescription>
-    </Alert>
-  );
-};
-
-export default ServerStatusAlert;