clean up usage of serde_yaml

examples/monitoring/Cargo.toml

@@ -9,6 +9,5 @@ license.workspace = true
 harmony = { version = "0.1.0", path = "../../harmony" }
 harmony_cli = { version = "0.1.0", path = "../../harmony_cli" }
 harmony_macros = { version = "0.1.0", path = "../../harmony_macros" }
-serde_yaml.workspace = true
 tokio.workspace = true
 url.workspace = true

examples/monitoring/src/main.rs

@@ -1,3 +1,5 @@
+use std::collections::HashMap;
+
 use harmony::{
     inventory::Inventory,
     maestro::Maestro,
@@ -56,15 +58,14 @@ async fn main() {
         relabelings: vec![],
     };
 
-    let mut selector = Mapping::new();
+    let mut selector = HashMap::new();
     selector.insert(
-        Value::from("matchExpressions"),
-        serde_yaml::to_value(vec![Selector {
+        "matchExpressions".to_string(),
+        vec![Selector {
             key: "monitored".to_string(),
             operator: "In".to_string(),
             values: vec!["test-service-1".to_string()],
-        }])
-        .expect("couldn't create mapping value"),
+        }],
     );
 
     let service_monitor = ServiceMonitor {