src: fix compiler warning in env.cc

     ../src/env.cc:1227:22: error: lambda capture 'this' is not used [-Werror,-Wunused-lambda-capture]
      ForEachBaseObject([this](BaseObject* obj) {
                     ^~~~

PR-URL: #35547
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Shelley Vohr <[email protected]>
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>

Author: addaleax

src/env.cc

@@ -1224,7 +1224,7 @@ void Environment::VerifyNoStrongBaseObjects() {
 
   if (!options()->verify_base_objects) return;
 
-  ForEachBaseObject([this](BaseObject* obj) {
+  ForEachBaseObject([](BaseObject* obj) {
     if (obj->IsNotIndicativeOfMemoryLeakAtExit()) return;
     fprintf(stderr, "Found bad BaseObject during clean exit: %s\n",
             obj->MemoryInfoName().c_str());