chore: remove .vscode files from git tracking

.vscode files should not be committed as they contain personal IDE settings.
These are already properly ignored in .gitignore.

.vscode/extensions.json

@@ -1,5 +0,0 @@
-{
-    "recommendations": [
-        "esbenp.prettier-vscode"
-    ]
-}

.vscode/settings.json

@@ -1,7 +0,0 @@
-{
-  "editor.defaultFormatter": "esbenp.prettier-vscode",
-  "editor.formatOnSave": true,
-  "[rust]": {
-    "editor.defaultFormatter": "rust-lang.rust-analyzer"
-  }
-}