Revert "build bun"

This reverts commit b0938f9102.

scripts/build_bun_binary.js

@@ -1,58 +0,0 @@
-/**
- * @license
- * Copyright 2025 Google LLC
- * SPDX-License-Identifier: Apache-2.0
- */
-
-import { spawnSync } from 'node:child_process';
-import { existsSync } from 'node:fs';
-import { dirname, join } from 'node:path';
-import { fileURLToPath } from 'node:url';
-
-const __dirname = dirname(fileURLToPath(import.meta.url));
-const repoRoot = join(__dirname, '..');
-const bundleDir = join(repoRoot, 'bundle');
-const bundlePath = join(bundleDir, 'gemini.js');
-const outputPath = join(bundleDir, 'gemini-bun');
-
-if (!existsSync(bundlePath)) {
-  console.error(
-    'bundle/gemini.js is missing. Run `npm run bundle` before compiling with Bun.',
-  );
-  process.exit(1);
-}
-
-const bunBinary =
-  process.env.BUN_BIN || process.env.BUN_PATH || process.env.BUN || 'bun';
-
-console.log(`Using Bun binary: ${bunBinary}`);
-const result = spawnSync(
-  bunBinary,
-  [
-    'build',
-    '--compile',
-    bundlePath,
-    '--outfile',
-    outputPath,
-    '--embed=./bundle/sandbox-*.sb',
-  ],
-  {
-    cwd: repoRoot,
-    env: { ...process.env, NODE_ENV: 'production' },
-    stdio: 'inherit',
-  },
-);
-
-if (result.error?.code === 'ENOENT') {
-  console.error(
-    'Bun runtime not found in PATH. Install Bun (https://bun.sh) or set BUN_BIN to the Bun executable.',
-  );
-  process.exit(1);
-}
-
-if ((result.status ?? 1) !== 0) {
-  console.error('Bun compilation failed.');
-  process.exit(result.status ?? 1);
-}
-
-console.log(`Bun single binary created at ${outputPath}`);