removeAppEvent method
Removes an app event from the target project by name.
Implementation
void removeAppEvent(String name) {
_queueRemoval(
name: name,
kind: 'app event',
declarationApi: 'event',
declaredNames: _appEventNames,
);
_rawMutations.add(
(project) => app_event_helpers.removeAppEvent(project, name: name),
);
}