Remove handling for 'CHANGED' discovery event

Cryostat backend never emits the 'CHANGED' event type anymore, instead emitting a LOST-FOUND sequence in any scenario where a target modification is detected

src/app/Events/EventTemplates.tsx

@@ -1,32 +1,32 @@
 /*
  * Copyright The Cryostat Authors
- * 
+ *
  * The Universal Permissive License (UPL), Version 1.0
- * 
+ *
  * Subject to the condition set forth below, permission is hereby granted to any
  * person obtaining a copy of this software, associated documentation and/or data
  * (collectively the "Software"), free of charge and under any and all copyright
  * rights in the Software, and any and all patent rights owned or freely
  * licensable by each licensor hereunder covering either (i) the unmodified
  * Software as contributed to or provided by such licensor, or (ii) the Larger
  * Works (as defined below), to deal in both
- * 
+ *
  * (a) the Software, and
  * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
  * one is included with the Software (each a "Larger Work" to which the Software
  * is contributed by such licensors),
- * 
+ *
  * without restriction, including without limitation the rights to copy, create
  * derivative works of, display, perform, and distribute the Software and make,
  * use, sell, offer for sale, import, export, have made, and have sold the
  * Software and the Larger Work(s), and to sublicense the foregoing rights on
  * either these or other terms.
- * 
+ *
  * This license is subject to the following condition:
  * The above copyright notice and either this complete permission notice or at
  * a minimum a reference to the UPL must be included in all copies or
  * substantial portions of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

src/app/TargetSelect/TargetSelect.tsx

@@ -1,32 +1,32 @@
 /*
  * Copyright The Cryostat Authors
- * 
+ *
  * The Universal Permissive License (UPL), Version 1.0
- * 
+ *
  * Subject to the condition set forth below, permission is hereby granted to any
  * person obtaining a copy of this software, associated documentation and/or data
  * (collectively the "Software"), free of charge and under any and all copyright
  * rights in the Software, and any and all patent rights owned or freely
  * licensable by each licensor hereunder covering either (i) the unmodified
  * Software as contributed to or provided by such licensor, or (ii) the Larger
  * Works (as defined below), to deal in both
- * 
+ *
  * (a) the Software, and
  * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
  * one is included with the Software (each a "Larger Work" to which the Software
  * is contributed by such licensors),
- * 
+ *
  * without restriction, including without limitation the rights to copy, create
  * derivative works of, display, perform, and distribute the Software and make,
  * use, sell, offer for sale, import, export, have made, and have sold the
  * Software and the Larger Work(s), and to sublicense the foregoing rights on
  * either these or other terms.
- * 
+ *
  * This license is subject to the following condition:
  * The above copyright notice and either this complete permission notice or at
  * a minimum a reference to the UPL must be included in all copies or
  * substantial portions of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ -94,14 +94,6 @@ export const TargetSelect: React.FunctionComponent<TargetSelectProps> = (props)
               selectNone();
             }
             break;
-          case 'CHANGED':
-            setTargets(old => {
-              const filtered = _.filter(old, t => t.connectUrl !== evt.serviceRef.connectUrl);
-              const updated =_.unionBy(filtered, [evt.serviceRef], t => t.connectUrl);
-              onSelect(undefined, _.find(updated, t => t.connectUrl === selected.connectUrl), false);
-              return updated;
-            });
-            break;
           default:
             notifications.danger(`Bad ${NOTIFICATION_CATEGORY} message received`, `Unknown event type ${evt.kind}`);
             break;
@@ -198,6 +190,6 @@ export const TargetSelect: React.FunctionComponent<TargetSelectProps> = (props)
 }
 
 interface TargetDiscoveryEvent {
-  kind: 'LOST' | 'FOUND' | 'CHANGED';
+  kind: 'LOST' | 'FOUND';
   serviceRef: Target;
 }