diff --git a/extensions/markdown-language-features/src/extension.ts b/extensions/markdown-language-features/src/extension.ts
index 536a12d9f57..53e0c6286e1 100644
--- a/extensions/markdown-language-features/src/extension.ts
+++ b/extensions/markdown-language-features/src/extension.ts
@@ -59,12 +59,4 @@ export function activate(context: vscode.ExtensionContext) {
 		logger.updateConfiguration();
 		previewManager.updateConfiguration();
 	}));
-
-	vscode.commands.registerCommand('unicorn', () => {
-		if (vscode.window.activeTextEditor) {
-			vscode.window.showWebviewWidget(vscode.window.activeTextEditor, vscode.window.activeTextEditor.selection.active, 'unicorn', 'Webview', {}).then(webview => {
-				webview.html = '<img src="https://media.giphy.com/media/JIX9t2j0ZTN9S/giphy.gif"/>';
-			});
-		}
-	});
 }
diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index cc3bbbbac46..5e679fd39e0 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -692,8 +692,6 @@ declare module 'vscode' {
 		 * @param reviver Webview serializer.
 		 */
 		export function registerWebviewSerializer(viewType: string, reviver: WebviewSerializer): Disposable;
-
-		export function showWebviewWidget(editor: TextEditor, position: Position, viewType: string, title: string, options: WebviewOptions): Thenable<Webview>;
 	}
 
 	//#endregion
diff --git a/src/vs/workbench/api/electron-browser/mainThreadComments.ts b/src/vs/workbench/api/electron-browser/mainThreadComments.ts
index 1134d394162..4eaf10e729d 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadComments.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadComments.ts
@@ -75,5 +75,4 @@ export class MainThreadComments extends Disposable implements MainThreadComments
 		}
 		return result;
 	}
-
 }
diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index 39e7fc810d1..2136bd733e6 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -423,9 +423,6 @@ export function createApiFactory(
 			}),
 			registerWebviewSerializer: proposedApiFunction(extension, (viewType: string, serializer: vscode.WebviewSerializer) => {
 				return extHostWebviews.registerWebviewSerializer(viewType, serializer);
-			}),
-			showWebviewWidget: proposedApiFunction(extension, (editor: vscode.TextEditor, position: vscode.Position, viewType: string, title: string, options: vscode.WebviewOptions) => {
-				return extHostWebviews.showWebviewWidget(editor, position, viewType, title, options);
 			})
 		};
 
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index 549543189cf..babbea619af 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -364,8 +364,6 @@ export interface MainThreadWebviewsShape extends IDisposable {
 
 	$registerSerializer(viewType: string): void;
 	$unregisterSerializer(viewType: string): void;
-
-	$showWebviewWidget(handle: WebviewHandle, editorId: string, position: IPosition, viewType: string, options: vscode.WebviewOptions): void;
 }
 
 export interface ExtHostWebviewsShape {
diff --git a/src/vs/workbench/api/node/extHostWebview.ts b/src/vs/workbench/api/node/extHostWebview.ts
index 393af8d3101..6b7798bdc3d 100644
--- a/src/vs/workbench/api/node/extHostWebview.ts
+++ b/src/vs/workbench/api/node/extHostWebview.ts
@@ -3,14 +3,13 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { MainContext, MainThreadWebviewsShape, IMainContext, ExtHostWebviewsShape, WebviewHandle } from './extHost.protocol';
-import * as vscode from 'vscode';
-import { Event, Emitter } from 'vs/base/common/event';
-import * as typeConverters from 'vs/workbench/api/node/extHostTypeConverters';
-import { Position } from 'vs/platform/editor/common/editor';
+import { Emitter, Event } from 'vs/base/common/event';
 import { TPromise } from 'vs/base/common/winjs.base';
+import { Position } from 'vs/platform/editor/common/editor';
+import * as typeConverters from 'vs/workbench/api/node/extHostTypeConverters';
+import * as vscode from 'vscode';
+import { ExtHostWebviewsShape, IMainContext, MainContext, MainThreadWebviewsShape, WebviewHandle } from './extHost.protocol';
 import * as types from './extHostTypes';
-import { ExtHostTextEditor } from './extHostTextEditor';
 
 export class ExtHostWebview implements vscode.Webview {
 
@@ -179,15 +178,6 @@ export class ExtHostWebviews implements ExtHostWebviewsShape {
 		});
 	}
 
-	async showWebviewWidget(editor: vscode.TextEditor, position: vscode.Position, viewType: string, title: string, options: vscode.WebviewOptions) {
-		const handle = ExtHostWebviews.webviewHandlePool++ + '';
-		this._proxy.$showWebviewWidget(handle, (editor as ExtHostTextEditor).id, typeConverters.fromPosition(new types.Position(position.line, position.character)), viewType, options);
-
-		const webview = new ExtHostWebview(handle, this._proxy, viewType, undefined, options);
-		this._webviews.set(handle, webview);
-		return webview;
-	}
-
 	$onMessage(handle: WebviewHandle, message: any): void {
 		const webview = this.getWebview(handle);
 		if (webview) {