Remove buffer dependency from @jupyterlab/apputils (#10050)

buildutils/src/ensure-repo.ts

@@ -33,7 +33,7 @@ const MISSING: Dict<string[]> = {
 
 const UNUSED: Dict<string[]> = {
   // url is a polyfill for sanitize-html
-  '@jupyterlab/apputils': ['@types/react', 'buffer', 'url'],
+  '@jupyterlab/apputils': ['@types/react', 'url'],
   '@jupyterlab/application': ['@fortawesome/fontawesome-free'],
   '@jupyterlab/apputils-extension': ['es6-promise'],
   '@jupyterlab/builder': [

packages/apputils/package.json

@@ -64,7 +64,6 @@
     "@lumino/virtualdom": "^1.8.0",
     "@lumino/widgets": "^1.19.0",
     "@types/react": "^17.0.0",
-    "buffer": "^5.6.0",
     "react": "^17.0.1",
     "react-dom": "^17.0.1",
     "sanitize-html": "~1.27.4",

yarn.lock

@@ -4880,14 +4880,6 @@ buffer@^4.3.0:
     ieee754 "^1.1.4"
     isarray "^1.0.0"
 
-buffer@^5.6.0:
-  version "5.6.0"
-  resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.6.0.tgz#a31749dc7d81d84db08abf937b6b8c4033f62786"
-  integrity sha512-/gDYp/UtU0eA1ys8bOs9J6a+E/KWIY+DZ+Q2WESNUA0jFRsJOc0SNUO6xJ5SGA1xueg3NL65W6s+NY5l9cunuw==
-  dependencies:
-    base64-js "^1.0.2"
-    ieee754 "^1.1.4"
-
 builtin-status-codes@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz#85982878e21b98e1c66425e03d0174788f569ee8"