Remove dependencies not required anymore from 'static' package

Summary:
I've already removed support for plugin format v1 and thus compilation on startup is not needed anymore and many dependencies can be safely removed.

I actually already removed them before that, but it looks like automerge returned them back somehow.

Reviewed By: mweststrate

Differential Revision: D23735001

fbshipit-source-id: 7b1ae655738a35e388f818fb27f80c5a0e8327de

desktop/static/package.json

@@ -7,10 +7,6 @@
   "dependencies": {
     "electron-devtools-installer": "^3.1.1",
     "fix-path": "^3.0.0",
-    "flipper-pkg-lib": "0.57.0",
-    "flipper-plugin-lib": "0.57.0",
-    "fs-extra": "^9.0.1",
-    "ignore": "^5.1.4",
     "mac-ca": "^1.0.4",
     "mkdirp": "^1.0.4",
     "node-fetch": "^2.6.1",