diff --git a/externs/olx.js b/externs/olx.js
index dfb5834b12..5fb451c4d9 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -757,13 +757,6 @@ olx.format.WMSGetFeatureInfoOptions;
 olx.format.WMSGetFeatureInfoOptions.prototype.layers;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.interaction;
-
-
 /**
  * @typedef {{duration: (number|undefined),
  *     delta: (number|undefined)}}
@@ -1771,13 +1764,6 @@ olx.interaction.SnapOptions.prototype.pixelTolerance;
 olx.interaction.SnapOptions.prototype.source;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.layer;
-
-
 /**
  * @typedef {{opacity: (number|undefined),
  *     visible: (boolean|undefined),
@@ -2631,13 +2617,6 @@ olx.layer.VectorTileOptions.prototype.visible;
 olx.layer.VectorTileOptions.prototype.zIndex;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.render;
-
-
 /**
  * @typedef {{context: CanvasRenderingContext2D,
  *     feature: (ol.Feature|ol.render.Feature),
@@ -2682,13 +2661,6 @@ olx.render.State.prototype.resolution;
 olx.render.State.prototype.rotation;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.source;
-
-
 /**
  * @typedef {{cacheSize: (number|undefined),
  *     culture: (string|undefined),
@@ -5237,13 +5209,6 @@ olx.source.ZoomifyOptions.prototype.transition;
 olx.source.ZoomifyOptions.prototype.tileSize;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.style;
-
-
 /**
  * @typedef {{fill: (ol.style.Fill|undefined),
  *     radius: number,
@@ -5936,13 +5901,6 @@ olx.style.StyleOptions.prototype.text;
 olx.style.StyleOptions.prototype.zIndex;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.tilegrid;
-
-
 /**
  * @typedef {{extent: (ol.Extent|undefined),
  *     minZoom: (number|undefined),
@@ -6177,16 +6135,6 @@ olx.tilegrid.XYZOptions.prototype.minZoom;
 olx.tilegrid.XYZOptions.prototype.tileSize;
 
 
-/**
- * Namespace.
- * @type {Object}
- */
-olx.view;
-
-
-/* typedefs for object literals exposed by the library */
-
-
 /**
  * @typedef {{center: ol.Coordinate,
  *     projection: ol.proj.Projection,