chore(ci): remove comments to allow CI MSRV to parse toml

Author: seanmonstar

Cargo.toml

@@ -59,7 +59,7 @@ tokio = { version = "1", features = [
     "io-std",
     "io-util",
     "rt",
-    "rt-multi-thread", # so examples can use #[tokio::main]
+    "rt-multi-thread",
     "sync",
     "time",
     "test-util",