Remove the unused remnants of NPObject from Pepper

ppapi/shared_impl/var.cc

Index: ppapi/shared_impl/var.cc
diff --git a/ppapi/shared_impl/var.cc b/ppapi/shared_impl/var.cc
index 195a5544dfe0553df92039c5e9b69baa390b44c2..c9aee16e30561c4a74c130577c7844926fcb9f71 100644
--- a/ppapi/shared_impl/var.cc
+++ b/ppapi/shared_impl/var.cc
@@ -80,8 +80,6 @@ StringVar* Var::AsStringVar() { return NULL; }
 
 ArrayBufferVar* Var::AsArrayBufferVar() { return NULL; }
 
-NPObjectVar* Var::AsNPObjectVar() { return NULL; }
-
 V8ObjectVar* Var::AsV8ObjectVar() { return NULL; }
 
 ProxyObjectVar* Var::AsProxyObjectVar() { return NULL; }