Remove unused fields

runtime/binding-grpc/src/main/java/io/aklivity/zilla/runtime/binding/grpc/internal/config/GrpcOptionsConfigAdapter.java

@@ -47,7 +47,6 @@ public final class GrpcOptionsConfigAdapter implements OptionsConfigAdapterSpi,
 {
     private static final String SERVICES_NAME = "services";
     private Function<String, String> readURL;
-    private ConfigAdapterContext context;
 
     @Override
     public Kind kind()

runtime/engine/src/main/java/io/aklivity/zilla/runtime/engine/internal/config/KindAdapter.java

@@ -24,12 +24,9 @@
 
 public class KindAdapter implements JsonbAdapter<KindConfig, JsonString>
 {
-    private final ConfigAdapterContext context;
-
     public KindAdapter(
         ConfigAdapterContext context)
     {
-        this.context = context;
     }
 
     @Override

runtime/engine/src/main/java/io/aklivity/zilla/runtime/engine/internal/config/NamspaceRefAdapter.java

@@ -36,12 +36,9 @@ public class NamspaceRefAdapter implements JsonbAdapter<NamespaceRef, JsonObject
 
     private static final Map<String, String> LINKS_DEFAULT = emptyMap();
 
-    private final ConfigAdapterContext context;
-
     public NamspaceRefAdapter(
         ConfigAdapterContext context)
     {
-        this.context = context;
     }
 
     @Override

runtime/engine/src/main/java/io/aklivity/zilla/runtime/engine/internal/config/RouteAdapter.java

@@ -43,15 +43,14 @@ public class RouteAdapter implements JsonbAdapter<RouteConfig, JsonObject>
     private static final String WITH_NAME = "with";
     private static final String GUARDED_NAME = "guarded";
 
-    private int index;
     private final ConditionAdapter condition;
     private final WithAdapter with;
-    private ConfigAdapterContext context;
+
+    private int index;
 
     public RouteAdapter(
         ConfigAdapterContext context)
     {
-        this.context = context;
         condition = new ConditionAdapter();
         with = new WithAdapter();
     }

runtime/engine/src/main/java/io/aklivity/zilla/runtime/engine/internal/config/TelemetryRefAdapter.java

@@ -22,8 +22,6 @@
 import jakarta.json.JsonArrayBuilder;
 import jakarta.json.JsonObject;
 import jakarta.json.JsonObjectBuilder;
-import jakarta.json.JsonString;
-import jakarta.json.JsonValue;
 import jakarta.json.bind.adapter.JsonbAdapter;
 
 import io.aklivity.zilla.runtime.engine.config.MetricRefConfig;
@@ -62,10 +60,4 @@ public TelemetryRefConfig adaptFromJson(
                 : List.of();
         return new TelemetryRefConfig(metricRefs);
     }
-
-    private static String asJsonString(
-        JsonValue value)
-    {
-        return ((JsonString) value).getString();
-    }
 }