[ES] cleanup debug change IDEA-222274

GitOrigin-RevId: f2cf3c93c2e0e41fea5fb3d748efcb5b0ce0b428

platform/external-system-impl/src/com/intellij/openapi/externalSystem/util/ExternalSystemUtil.java

@@ -509,14 +509,6 @@ public class ExternalSystemUtil {
               processHandler.notifyProcessTerminated(1);
             }
 
-            @Override
-            public void onEnd(@NotNull ExternalSystemTaskId id) {
-              if (finishSyncEventSupplier.isNull()) {
-                finishSyncEventSupplier.set(
-                  () -> new FinishBuildEventImpl(id, null, System.currentTimeMillis(), "finished", new SuccessResultImpl()));
-              }
-            }
-
             @Override
             public void onSuccess(@NotNull ExternalSystemTaskId id) {
               finishSyncEventSupplier.set(