fix: remove unused/invalid attr for file graph var

caught by linter

src/main/frontend/db/file_based/model.cljs

@@ -38,7 +38,6 @@
     ;; TODO: remove this in later releases
     :block/heading-level
     :block/file
-    :logseq.property/parent
     {:block/page [:db/id :block/name :block/title :block/uuid :block/journal-day :block/type]}
     {:block/_parent ...}])