[misc] Remove leftover

xwiki-platform-core/xwiki-platform-component/xwiki-platform-component-multi/src/main/java/org/xwiki/component/internal/AbstractEntityComponentManager.java

@@ -28,7 +28,6 @@
 import org.xwiki.context.ExecutionContext;
 import org.xwiki.model.reference.EntityReference;
 import org.xwiki.model.reference.EntityReferenceSerializer;
-import org.xwiki.observation.ObservationManager;
 
 /**
  * Proxy Component Manager that creates and queries individual Component Managers specific to the current entity in the
@@ -53,9 +52,6 @@ public EntityComponentManagerInstance(EntityReference entityReference, Component
         }
     }
 
-    @Inject
-    protected ObservationManager observation;
-
     @Inject
     private EntityReferenceSerializer<String> serializer;