Remove command palette POC (#24044)

* Revert "POC: Cross-team recent search (#20027)"

This reverts commit aa59c28b04, preserving
a few code tidyings unrelated to the original PR.

* Revert "Add feature flag for command palette (#20011)"

This reverts commit c78c5ce3f3.

server/channels/store/store.go

@@ -396,8 +396,6 @@ type PostStore interface {
 	GetRepliesForExport(parentID string) ([]*model.ReplyForExport, error)
 	GetDirectPostParentsForExportAfter(limit int, afterID string) ([]*model.DirectPostForExport, error)
 	SearchPostsForUser(paramsList []*model.SearchParams, userID, teamID string, page, perPage int) (*model.PostSearchResults, error)
-	GetRecentSearchesForUser(userID string) ([]*model.SearchParams, error)
-	LogRecentSearch(userID string, searchQuery []byte, createAt int64) error
 	GetOldestEntityCreationTime() (int64, error)
 	HasAutoResponsePostByUserSince(options model.GetPostsSinceOptions, userId string) (bool, error)
 	GetPostsSinceForSync(options model.GetPostsSinceForSyncOptions, cursor model.GetPostsSinceForSyncCursor, limit int) ([]*model.Post, model.GetPostsSinceForSyncCursor, error)