Fix Checkstyle

proxy/src/main/java/com/velocitypowered/proxy/Metrics.java

@@ -524,7 +524,6 @@ public class Metrics {
 
     @Override
     protected JsonObject getChartData() throws Exception {
-      JsonObject data = new JsonObject();
       JsonObject values = new JsonObject();
       Map<String, int[]> map = callable.call();
       if (map == null || map.isEmpty()) {
@@ -547,6 +546,7 @@ public class Metrics {
         // Null = skip the chart
         return null;
       }
+      JsonObject data = new JsonObject();
       data.add("values", values);
       return data;
     }

proxy/src/main/java/com/velocitypowered/proxy/config/VelocityConfiguration.java

@@ -731,11 +731,11 @@ public class VelocityConfiguration extends AnnotatedConfig implements ProxyConfi
     @Ignore
     private boolean fromConfig;
 
-    public Metrics() {
+    private Metrics() {
       this.fromConfig = false;
     }
 
-    public Metrics(Toml toml) {
+    private Metrics(Toml toml) {
       if (toml != null) {
         this.enabled = toml.getBoolean("enabled", false);
         this.id = toml.getString("id", UUID.randomUUID().toString());