platform/platform-resources/src/componentSets/Xml.xml

<components>
  <project-components>
    <component>
      <implementation-class>com.intellij.xml.breadcrumbs.BreadcrumbsLoaderComponent</implementation-class>
      <skipForDefaultProject/>
    </component>
    <component>
      <interface-class>com.intellij.pom.xml.XmlAspect</interface-class>
      <implementation-class>com.intellij.pom.xml.impl.XmlAspectImpl</implementation-class>
      <!--<loadForDefaultProject/>-->
    </component>

    <component>
      <implementation-class>com.intellij.javaee.PsiExternalResourceNotifier</implementation-class>
    </component>
  </project-components>
</components>