diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index 7a578e153..682bd3f98 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -1300,11 +1300,6 @@ void WebContents::OpenDevTools(mate::Arguments* args) {
     mate::Dictionary options;
     if (args->GetNext(&options)) {
       options.Get("mode", &state);
-
-      // TODO(kevinsawicki) Remove in 2.0
-      options.Get("detach", &detach);
-      if (state.empty() && detach)
-        state = "detach";
     }
   }
   managed_web_contents()->SetDockState(state);
diff --git a/docs/tutorial/planned-breaking-changes.md b/docs/tutorial/planned-breaking-changes.md
index dc03ed6a2..6cbba789e 100644
--- a/docs/tutorial/planned-breaking-changes.md
+++ b/docs/tutorial/planned-breaking-changes.md
@@ -40,15 +40,6 @@ ses.setCertificateVerifyProc(function (request, callback) {
 })
 ```
 
-## `webContents`
-
-```js
-// Deprecated
-webContents.openDevTools({detach: true})
-// Replace with
-webContents.openDevTools({mode: 'detach'})
-```
-
 ## `webFrame`
 
 ```js
diff --git a/lib/browser/api/web-contents.js b/lib/browser/api/web-contents.js
index 96e0e1644..ccfc26d7c 100644
--- a/lib/browser/api/web-contents.js
+++ b/lib/browser/api/web-contents.js
@@ -165,14 +165,6 @@ for (const method of webFrameMethodsWithResult) {
   }
 }
 
-const nativeOpenDevTools = WebContents.prototype.openDevTools
-WebContents.prototype.openDevTools = function (params) {
-  if (!process.noDeprecations && params && 'detach' in params) {
-    deprecate.warn('webContents.openDevTools({detach: true})', `webContents.openDevTools({mode: 'detach'})`)
-  }
-  return nativeOpenDevTools.call(this, params)
-}
-
 // Make sure WebContents::executeJavaScript would run the code only when the
 // WebContents has been loaded.
 WebContents.prototype.executeJavaScript = function (code, hasUserGesture, callback) {