Remove powered by ESRI logo
ArcGIS API for JavaScript 3.x
map = new esri.Map("map", { extent: initExtent, logo:false });
ArcGIS API for JavaScript 4.x
var view = new MapView({ ... });
view.ui._removeComponents(["attribution"]);
map = new esri.Map("map", { extent: initExtent, logo:false });
ArcGIS API for JavaScript 4.x
var view = new MapView({ ... });
view.ui._removeComponents(["attribution"]);