#70459 make the setting internal and call it disabled

src/vs/code/electron-main/window.ts

@@ -314,7 +314,7 @@ export class CodeWindow extends Disposable implements ICodeWindow {
 		this._win.webContents.session.webRequest.onBeforeSendHeaders({ urls }, (details: any, cb: any) => {
 			this.marketplaceHeadersPromise.then(headers => {
 				const requestHeaders = objects.assign(details.requestHeaders, headers);
-				if (this.configurationService.getValue('extensions.enableExperimentalAzureSearch')) {
+				if (!this.configurationService.getValue('extensions.disableExperimentalAzureSearch')) {
 					requestHeaders['Cookie'] = `${requestHeaders['Cookie'] ? requestHeaders['Cookie'] + ';' : ''}EnableExternalSearchForVSCode=true`;
 				}
 				cb({ cancel: false, requestHeaders });

src/vs/workbench/contrib/extensions/electron-browser/extensions.contribution.ts

@@ -247,11 +247,6 @@ Registry.as<IConfigurationRegistry>(ConfigurationExtensions.Configuration)
 				default: false,
 				scope: ConfigurationScope.APPLICATION,
 				tags: ['usesOnlineServices']
-			},
-			'extensions.enableExperimentalAzureSearch': {
-				type: 'boolean',
-				description: localize('enableExperimentalAzureSearch', "Enable experimental Azure based search for searching extensions in Marketplace."),
-				default: true
 			}
 		}
 	});