Remove legacy Nextcloud DB view migration

runtime/nextcloud/update-showcase-source-view.sql

@@ -1,17 +0,0 @@
-CREATE OR REPLACE VIEW piwigo_showcase_sources AS
-SELECT
-  s.id AS share_id,
-  s.file_target AS display_name,
-  st.id AS storage_id,
-  f.path AS source_path,
-  s.accepted,
-  s.permissions,
-  s.item_type AS item_type
-FROM oc_share AS s
-JOIN oc_filecache AS f ON f.fileid = s.file_source
-JOIN oc_storages AS st ON st.numeric_id = f.storage
-WHERE lower(s.share_with) = 'showcase'
-  AND s.item_type IN ('folder', 'file')
-  AND s.accepted = 1;
-
-GRANT SELECT ON piwigo_showcase_sources TO piwigo_reader;