All reports of postinst-has-useless-call-to-install-docs for the archive. The extended description of this tag is:
Explicitly calling install-docs in postinst is no longer required since doc-base file processing is handled by triggers. If the install-docs call was added by debhelper, rebuilding the package with debhelper 7.2.3 or later will fix this problem.
This tag has not been emitted in any package tested by Lintian.