Loading feature information... (what?)

I just updated to the newest version of Cesium and now whenever I click on the map it brings up a window that says "Loading feature information..." and then loads this:

NAIP2014
OBJECTID 3291
Shape Polygon
DATE (YYYYMMDD) 20141016
RESOLUTION (M) 1
ACCURACY (M) 6
DESCRIPTION NAIP
SOURCE_INFO NAIP2014
SOURCE USDA FSA
SRC_DATE2 10/16/2014

What is this? why did is suddenly starting doing this? How do you stop it from doing this?

Fixed it by changing
    viewer = new Cesium.Viewer('map', {
        baseLayerPicker: false
    });

to...

    viewer = new Cesium.Viewer('map', {
        baseLayerPicker: true
    });

But then that changes the base I use, any idea of what is causing this?

Cesium lets the user pick features from rasterized WebMapServiceImageryProvider and ArcGisMapServerImageryProvider layers by invoking GetFeatureInfo or /identify (respectively) on the server. If you don’t want your imagery provider to be pickable, pass the “enablePickFeatures: false” option to the constructor of the imagery provider.

Really appreciate it! Worked like a charm.

Just in case anyone sees this in the future, here is the exact change I made:

    viewer = new Cesium.Viewer('map', {
        animation: false,
        fullscreenButton: false,
        timeline: false,
        geocoder: false,
        homeButton: false,
        imageryProvider: new Cesium.ArcGisMapServerImageryProvider({
            url: '//server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer',
            enablePickFeatures: false //<-- here, change to false.
    });
        }),
        terrainProvider: new Cesium.CesiumTerrainProvider({
            url: '//cesiumjs.org/stk-terrain/tilesets/world/tiles'
        }),
        baseLayerPicker: false //<-- here, change to true.
    });