Graph's delete permission needs a refactor

[jvillafanez]

Describe the bug

Some of the internal requests that happen when a space manager removes a member from a space are weird

Steps to reproduce

1. Remove a user from a space
2. Resend the exact same request

Expected behavior

Either no error happens because the user has been already removed, or a clear error is shown

Actual behavior

Even with owncloud/reva#527 patch applied, there are weird error logs:

{"level":"info","service":"gateway","pkg":"rgrpc","traceid":"143fd9c25333e92449b59e2a4b647cb5","time":"2026-02-11T13:09:28Z","line":"/home/juan/src/ocis/ocis/vendor/github.com/owncloud/reva/v2/internal/grpc/services/gateway/publicshareprovider.go:75","message":"get public share"}
{"level":"info","service":"sharing","pkg":"rgrpc","traceid":"143fd9c25333e92449b59e2a4b647cb5","publicshareprovider":"get","time":"2026-02-11T13:09:28Z","line":"/home/juan/src/ocis/ocis/vendor/github.com/owncloud/reva/v2/internal/grpc/services/publicshareprovider/publicshareprovider.go:417","message":"get public share"}
{"level":"info","service":"storage-system","pkg":"rgrpc","traceid":"339d8360a33698a344cf773b70d53785","time":"2026-02-11T13:09:28Z","line":"/home/juan/src/ocis/ocis/vendor/github.com/owncloud/reva/v2/internal/grpc/services/authprovider/authprovider.go:146","message":"user idp:\"internal\" opaque_id:\"4bce0814-5756-40a6-8385-dafe6f2c9e09\" type:USER_TYPE_PRIMARY authenticated"}
{"level":"error","service":"graph","graph api":"DrivesDriveItemService","error":"itemNotFound: error: not found: no shares found by id:opaque_id:\"u:7e21589b-4856-4366-9558-312c6b30f994\"","permissionID":"u:7e21589b-4856-4366-9558-312c6b30f994","time":"2026-02-11T13:09:28Z","line":"/home/juan/src/ocis/ocis/services/graph/pkg/service/v0/base.go:844","message":"GetPublicShare failed"}

That error seems to come from https://github.com/owncloud/ocis/blob/master/services/graph/pkg/service/v0/api_driveitem_permissions.go#L561 , from the getLinkPermissionResourceID method, but neither the result nor the error are considered for spaces.
It's a superfluous call that triggers an error log. This will be confusing to debug.

Setup

Please describe how you started the server and provide a list of relevant environment variables or configuration files.

Details

OCIS_XXX=somevalue
OCIS_YYY=somevalue
PROXY_XXX=somevalue

Additional context

Add any other context about the problem here.