fix(lib/vscode): remove native-keymap and keytar (#2961)

native-keymap and keytar are only used in the electron process,
so we don't need them. This allows us to drop our dependencies on
libx11-dev, libxkbfile-dev, and libsecret-dev.

lib/vscode/package.json

@@ -68,10 +68,8 @@
     "https-proxy-agent": "^2.2.3",
     "iconv-lite-umd": "0.6.8",
     "jschardet": "2.2.1",
-    "keytar": "7.2.0",
     "minimist": "^1.2.5",
     "native-is-elevated": "0.4.1",
-    "native-keymap": "2.2.1",
     "native-watchdog": "1.3.0",
     "node-pty": "0.10.0-beta19",
     "proxy-agent": "^4.0.0",
@@ -106,7 +104,6 @@
     "@types/graceful-fs": "4.1.2",
     "@types/gulp-postcss": "^8.0.0",
     "@types/http-proxy-agent": "^2.0.1",
-    "@types/keytar": "^4.4.0",
     "@types/minimist": "^1.2.1",
     "@types/mocha": "^8.2.0",
     "@types/node": "^12.19.9",