Dead Code Quest: updateMapSize in map.js

[theduckylittle]

Look at this guy right here:

   // IE has some DOM sizing/display issues on startup
    //  when we're using react. This ensures the map is
    //  drawn correctly on startup.
    const updateMapSize = this.updateMapSize;
    if (!updateMapSize()) {
      const startupInterval = setInterval(function () {
        if (updateMapSize()) {
          clearInterval(startupInterval);
        }
      }, 250);
    }

Traceback whether this is necessary with modern ResizeOberservers.