--- a/devtools/client/inspector/computed/computed.js
+++ b/devtools/client/inspector/computed/computed.js
@@ -21,17 +21,16 @@ const {
   VIEW_NODE_SELECTOR_TYPE,
   VIEW_NODE_PROPERTY_TYPE,
   VIEW_NODE_VALUE_TYPE,
   VIEW_NODE_IMAGE_URL_TYPE,
 } = require("devtools/client/inspector/shared/node-types");
 const StyleInspectorMenu = require("devtools/client/inspector/shared/style-inspector-menu");
 const TooltipsOverlay = require("devtools/client/inspector/shared/tooltips-overlay");
 const KeyShortcuts = require("devtools/client/shared/key-shortcuts");
-const BoxModelView = require("devtools/client/inspector/components/deprecated-box-model");
 const clipboardHelper = require("devtools/shared/platform/clipboard");
 
 const STYLE_INSPECTOR_PROPERTIES = "devtools/shared/locales/styleinspector.properties";
 const {LocalizationHelper} = require("devtools/shared/l10n");
 const STYLE_INSPECTOR_L10N = new LocalizationHelper(STYLE_INSPECTOR_PROPERTIES);
 
 const PREF_ORIG_SOURCES = "devtools.styleeditor.source-maps-enabled";
 
@@ -1411,17 +1410,16 @@ SelectorView.prototype = {
 };
 
 function ComputedViewTool(inspector, window) {
   this.inspector = inspector;
   this.document = window.document;
 
   this.computedView = new CssComputedView(this.inspector, this.document,
     this.inspector.pageStyle);
-  this.boxModelView = new BoxModelView(this.inspector, this.document);
 
   this.onSelected = this.onSelected.bind(this);
   this.refresh = this.refresh.bind(this);
   this.onPanelSelected = this.onPanelSelected.bind(this);
   this.onMutations = this.onMutations.bind(this);
   this.onResized = this.onResized.bind(this);
 
   this.inspector.selection.on("detached-front", this.onSelected);
@@ -1520,17 +1518,16 @@ ComputedViewTool.prototype = {
     this.inspector.selection.off("new-node-front", this.onSelected);
     this.inspector.selection.off("detached-front", this.onSelected);
     this.inspector.sidebar.off("computedview-selected", this.onPanelSelected);
     if (this.inspector.pageStyle) {
       this.inspector.pageStyle.off("stylesheet-updated", this.refresh);
     }
 
     this.computedView.destroy();
-    this.boxModelView.destroy();
 
-    this.computedView = this.boxModelView = this.document = this.inspector = null;
+    this.computedView = this.document = this.inspector = null;
   }
 };
 
 exports.CssComputedView = CssComputedView;
 exports.ComputedViewTool = ComputedViewTool;
 exports.PropertyView = PropertyView;