MAISTRA-1873 Properly delete extensions from store when they disappear (

#182)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/servicemesh/controller/extension/controller.go

@@ -108,7 +108,7 @@ func NewControllerFromConfigFile(kubeConfig string, namespaces []string, mrc mem
 						return
 					}
 				}
-				store[extension.Namespace+"/"+extension.Name] = nil
+				delete(store, extension.Namespace+"/"+extension.Name)
 				log.Infof("Deleted extension %s/%s", extension.Namespace, extension.Name)
 			},
 		})