[Extensions] Remove unnecessary check in app_custom_bindings.js

chrome/renderer/resources/extensions/app_custom_bindings.js

Index: chrome/renderer/resources/extensions/app_custom_bindings.js
diff --git a/chrome/renderer/resources/extensions/app_custom_bindings.js b/chrome/renderer/resources/extensions/app_custom_bindings.js
index b91705fb95c5219a3a17f3be4908b8af8651b66c..4d58054b989b2a6b18d6ff555db9153abf1fe7c9 100644
--- a/chrome/renderer/resources/extensions/app_custom_bindings.js
+++ b/chrome/renderer/resources/extensions/app_custom_bindings.js
@@ -4,13 +4,6 @@
 
 // Custom binding for the app API.
 
-var GetAvailability = requireNative('v8_context').GetAvailability;
-if (!GetAvailability('app').is_available) {
-  exports.$set('binding', {});
-  exports.$set('onInstallStateResponse', function(){});
-  return;
-}
-
 var appNatives = requireNative('app');
 var process = requireNative('process');
 var extensionId = process.GetExtensionId();