Core: remove isArraylike check for nodes

Fixes gh-2238
Close gh-2243

src/core.js

@@ -496,10 +496,6 @@ function isArraylike( obj ) {
 		return false;
 	}
 
-	if ( obj.nodeType === 1 && length ) {
-		return true;
-	}
-
 	return type === "array" || length === 0 ||
 		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
 }