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/api4/user.go

@@ -91,7 +91,6 @@ func (api *API) InitUser() {
 
 	api.BaseRoutes.User.Handle("/uploads", api.APISessionRequired(getUploadsForUser)).Methods("GET")
 	api.BaseRoutes.User.Handle("/channel_members", api.APISessionRequired(getChannelMembersForUser)).Methods("GET")
-	api.BaseRoutes.User.Handle("/recent_searches", api.APISessionRequiredDisableWhenBusy(getRecentSearches)).Methods("GET")
 
 	api.BaseRoutes.Users.Handle("/invalid_emails", api.APISessionRequired(getUsersWithInvalidEmails)).Methods("GET")
 
@@ -3397,25 +3396,3 @@ func getUsersWithInvalidEmails(c *Context, w http.ResponseWriter, r *http.Reques
 		c.Logger.Warn("Error writing response", mlog.Err(err))
 	}
 }
-
-func getRecentSearches(c *Context, w http.ResponseWriter, r *http.Request) {
-	c.RequireUserId()
-	if c.Err != nil {
-		return
-	}
-
-	if !c.App.SessionHasPermissionToUser(*c.AppContext.Session(), c.Params.UserId) {
-		c.SetPermissionError(model.PermissionEditOtherUsers)
-		return
-	}
-
-	searchParams, err := c.App.GetRecentSearchesForUser(c.Params.UserId)
-	if err != nil {
-		c.Err = err
-		return
-	}
-
-	if err := json.NewEncoder(w).Encode(searchParams); err != nil {
-		c.Logger.Warn("Error while writing response", mlog.Err(err))
-	}
-}