diff --git a/src/vs/vscode.d.ts b/src/vs/vscode.d.ts
index 681afeab41e..62e41309e06 100644
--- a/src/vs/vscode.d.ts
+++ b/src/vs/vscode.d.ts
@@ -3021,11 +3021,6 @@ declare namespace vscode {
 		 */
 		export function openTextDocument(fileName: string): Thenable<TextDocument>;
 
-		/**
-		 *
-		 */
-		export function closeTextDocument(document: TextDocument): Thenable<boolean>;
-
 		/**
 		 *
 		 */
diff --git a/src/vs/workbench/api/common/extHost.api.impl.ts b/src/vs/workbench/api/common/extHost.api.impl.ts
index 9bf9020a937..a1b5619ec80 100644
--- a/src/vs/workbench/api/common/extHost.api.impl.ts
+++ b/src/vs/workbench/api/common/extHost.api.impl.ts
@@ -255,9 +255,6 @@ export class ExtHostAPIImplementation {
 			openTextDocument(uriOrFileName:vscode.Uri | string) {
 				return pluginHostDocuments.openDocument(uriOrFileName);
 			},
-			closeTextDocument(document: vscode.TextDocument) {
-				return pluginHostDocuments.closeDocument(document);
-			},
 			registerTextDocumentContentProvider(scheme: string, provider: vscode.TextDocumentContentProvider) {
 				return pluginHostDocuments.registerTextDocumentContentProvider(scheme, provider);
 			},
diff --git a/src/vs/workbench/api/common/extHostDocuments.ts b/src/vs/workbench/api/common/extHostDocuments.ts
index 72a843c7968..b6b9be12ac3 100644
--- a/src/vs/workbench/api/common/extHostDocuments.ts
+++ b/src/vs/workbench/api/common/extHostDocuments.ts
@@ -136,10 +136,6 @@ export class ExtHostModelService {
 		});
 	}
 
-	public closeDocument(document: vscode.TextDocument): TPromise<boolean> {
-		return this._proxy._tryCloseDocument(<URI> document.uri);
-	}
-
 	public registerTextDocumentContentProvider(scheme: string, provider: vscode.TextDocumentContentProvider): vscode.Disposable {
 		if (scheme === 'file' || scheme === 'untitled' || this._documentContentProviders[scheme]) {
 			throw new Error(`scheme '${scheme}' already registered`);
@@ -752,9 +748,4 @@ export class MainThreadDocuments {
 			return true;
 		});
 	}
-
-	_tryCloseDocument(uri: URI): TPromise<boolean> {
-		this._modelService.destroyModel(uri);
-		return TPromise.as(true);
-	}
 }