Remove obsolete Lintian overrides.
This merge request removes a bunch of obsolete Lintian overrides that no longer override anything. In some cases it is because the files in question no longer exist in the source tarball. In other cases it seems that either the files have changed (no longer minified), the unminified source is now shipped in a place that Lintian can find it, or Lintian has gotten smarter about figuring out which JavaScript and HTML files should be flagged.