Remove restriction on non-WAL restore

Never really had a strong reason for it.

http/service.go

@@ -679,13 +679,6 @@ func (s *Service) handleLoad(w http.ResponseWriter, r *http.Request, qp QueryPar
 			Data: b,
 		}
 
-		if db.IsWALModeEnabled(b) {
-			s.logger.Printf("SQLite database file is in WAL mode - rejecting load request")
-			http.Error(w, `SQLite database file is in WAL mode - convert it to DELETE mode via 'PRAGMA journal_mode=DELETE'`,
-				http.StatusBadRequest)
-			return
-		}
-
 		err := s.store.Load(lr)
 		if err != nil && err != store.ErrNotLeader {
 			http.Error(w, err.Error(), http.StatusInternalServerError)

store/store.go

@@ -367,9 +367,6 @@ func (s *Store) SetRestorePath(path string) error {
 	if !sql.IsValidSQLiteFile(path) {
 		return fmt.Errorf("file %s is not a valid SQLite file", path)
 	}
-	if sql.IsWALModeEnabledSQLiteFile(path) {
-		return fmt.Errorf("file %s is in WAL mode - convert to DELETE mode", path)
-	}
 
 	s.RegisterReadyChannel(s.restoreDoneCh)
 	s.restorePath = path