Remove lint dependency ufmt (#132573)

`ufmt` is a combination of `black + usort`.

This PR removes `ufmt` and run `black` and `usort` separately.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/132573
Approved by: https://github.com/ezyang
ghstack dependencies: #129769, #132572

.vscode/extensions.json

@@ -1,6 +1,5 @@
 {
   "recommendations": [
     "ms-python.python",
-    "omnilib.ufmt"
   ]
 }

.vscode/settings_recommended.json

@@ -4,14 +4,12 @@
     },
     "files.associations": {
         "*.py.in": "python",
-        "*.pyi.in": "python",
-        "editor.defaultFormatter": "omnilib.ufmt"
+        "*.pyi.in": "python"
     },
     "files.eol": "\n",
     "files.insertFinalNewline": true,
     "files.trimFinalNewlines": true,
     "files.trimTrailingWhitespace": true,
-    "python.formatting.provider": "none",
     "python.linting.enabled": true,
     "python.linting.flake8Enabled": true
 }