There's an H3 at the top of the PorterDuff.Mode javadoc comment, and that breaks the TOC in various ways. We don't need that heading so I'm removing it. Test: make ds-docs-java Exempt-from-owner-approval: Docs-only change Change-Id: I6d5f98b5103a77a7d0245a438b6961c4a21fb059 Bug: 311897143