message: Improve create_remove_plan (still using Graph)
diff: @@ -190,10 +190,9 @@ namespace vcpkg::Dependencies
  continue;
  }
  - for (const std::unique_ptr<StatusParagraph>& an_installed_package : status_db)
  + const std::vector<StatusParagraph*> installed_ports = get_installed_ports(status_db);
  + for (const StatusParagraph* an_installed_package : installed_ports)
  {
  - if (an_installed_package->want != Want::INSTALL)
  - continue;
  if (an_installed_package->package.spec.triplet() != spec.triplet())
  continue;
  @@ -203,8 +202,8 @@ namespace vcpkg::Dependencies
  continue;
  }
  - graph.add_edge(spec, an_installed_package.get()->package.spec);
  - examine_stack.push_back(an_installed_package.get()->package.spec);
  + graph.add_edge(spec, an_installed_package->package.spec);
  + examine_stack.push_back(an_installed_package->package.spec);
  }
  const RequestType request_type = specs_as_set.find(spec) != specs_as_set.end() ? RequestType::USER_REQUESTED : RequestType::AUTO_SELECTED;
  