chore: remove dead ./react-with-deps export (copy-paste bug from #221)

The react-with-deps build entry was introduced in PR #221 (e078250) as a
sibling to app-with-deps for CDN/unpkg no-bundler use. But its external
array was duplicated without editing — it never dropped @modelcontextprotocol/sdk
from externals, so it has shipped byte-identical to ./react for 10 releases
(v0.3.1 → v1.2.0).

After #534 merged, both entries use ['react', 'react-dom', ...PEER_EXTERNALS]
— still identical, just smaller.

Delete rather than fix: React apps always use a bundler; the CDN/unpkg
use case (HTML-string apps like qr-server) doesn't apply to React hooks.
Zero consumers verified (examples/docs/tests/plugins).

Author: ochafik

build.bun.ts

@@ -52,11 +52,6 @@ await Promise.all([
     outdir: "dist/src/react",
     external: ["react", "react-dom", ...PEER_EXTERNALS],
   }),
-  buildJs("src/react/index.tsx", {
-    outdir: "dist/src/react",
-    external: ["react", "react-dom", ...PEER_EXTERNALS],
-    naming: { entry: "react-with-deps.js" },
-  }),
   buildJs("src/server/index.ts", {
     outdir: "dist/src/server",
     external: PEER_EXTERNALS,

package.json

@@ -26,10 +26,6 @@
       "types": "./dist/src/react/index.d.ts",
       "default": "./dist/src/react/index.js"
     },
-    "./react-with-deps": {
-      "types": "./dist/src/react/index.d.ts",
-      "default": "./dist/src/react/react-with-deps.js"
-    },
     "./app-bridge": {
       "types": "./dist/src/app-bridge.d.ts",
       "default": "./dist/src/app-bridge.js"