vscode settings: remove inlay hints setting

I had this set to off because it was interfering with checking if the
line goes beyond 100 columns. But `cargo fmt` mostly takes care of that
anyway. Leave it up to the user/workspace settings rather than the
project one.

.vscode/settings.json

@@ -41,7 +41,6 @@
     "editor.defaultFormatter": "matklad.rust-analyzer"
     //"editor.defaultFormatter": null
   },
-  "rust-analyzer.inlayHints.enable": false,
   "markdown.extension.list.indentationSize": "inherit",
   "markdown.extension.toc.unorderedList.marker": "*",