chore: trim the rust fixture manifest

Author: cat-ph

apps/error-tracking-upload-source-maps/rust/Cargo.toml

@@ -3,10 +3,6 @@ name = "rust-app"
 version = "0.1.0"
 edition = "2021"
 
-# Intentionally no [profile.release] debug-info settings: the
-# upload-source-maps skill's "keep debug info in release builds" gotcha
-# requires the agent to add them, so the fixture must start without.
-
 [dependencies]
 posthog-rs = "0.20"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }