Rust - Clean up unwanted settings (#434)

* Rust - Clean up unwanted settings

* address comments

src/rust/devcontainer-feature.json

 {
     "id": "rust",
-    "version": "1.0.10",
+    "version": "1.0.11",
     "name": "Rust",
     "documentationURL": "https://github.com/devcontainers/features/tree/main/src/rust",
     "description": "Installs Rust, common Rust utilities, and their required dependencies",
@@ -38,11 +38,9 @@
                 "serayuzgur.crates"
             ],
             "settings": {
-                "lldb.executable": "/usr/bin/lldb",
                 "files.watcherExclude": {
                     "**/target/**": true
-                },
-                "rust-analyzer.checkOnSave.command": "clippy"
+                }
             }
         }
     },