sharee does not receive a mail notification when sharer unshares a resource

[nirajacharya2]

Describe the bug

User does not get email notification when a resource is unshared.

Steps to reproduce

1. Alice creates a resource textfile.txt
2. share the resource to Brian using command curl -kv -X POST https://localhost:9200/ocs/v1.php/apps/files_sharing/api/v1/shares -d 'shareType=0&path=/testfile.txt&permission=3&shareWith=brian' -u alice:123456
3. Brian accepts the share
4. Alice unshares the resource

curl -kv -X DELETE https://localhost:9200/ocs/v1.php/apps/files_sharing/api/v1/shares/<share-id> -u alice:123456

Expected behavior

Brian should receive a mail notification when resource is unshared by Alice

Actual behavior

Brian does not get any mail notification when the resource is unshared.

Setup

email server used: inbucket
Ocis : latest master

Additional context

Add any other context about the problem here.

[2403905]

There are only two share events that are triggered by email ShareCreated and ShareExpired and 3 for the Spaces

ocis/services/notifications/pkg/service/service.go

Lines 87 to 90 in 6bb265f

	case events.ShareCreated:
	s.handleShareCreated(e)
	case events.ShareExpired:
	s.handleShareExpired(e)

If we need more it could be the feature request

[phil-davis]

What is the requirement?
"somebody" needs to define the requirement.

[SwikritiT]

According to #6636 (comment) this is not an issue but a feature request. Closing this for now. If someone wants this feature it can be defined later like other notifications related unimplemented features #6649 (comment)

cc @ScharfViktor