Update RCDSystem.cs to not use Component.Owner (#29940)

Update RCDSystem.cs

Co-authored-by: plykiya <plykiya@protonmail.com>

Content.Shared/RCD/Systems/RCDSystem.cs

@@ -572,8 +572,6 @@ public class RCDSystem : EntitySystem
                 return false;
         }
 
-        gridUid = mapGrid.Owner;
-
         var tile = _mapSystem.GetTileRef(gridUid.Value, mapGrid, location);
         var position = _mapSystem.TileIndicesFor(gridUid.Value, mapGrid, location);
         mapGridData = new MapGridData(gridUid.Value, mapGrid, location, tile, position);