content: remove Research Themes section from home page

Redundant with the dedicated research page.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: brian033

src/components/sections/ResearchFocusStrip.tsx

@@ -1,13 +1,11 @@
 import { HomeHeroSection } from "../components/sections/HomeHeroSection";
 import { ProjectHighlightGrid } from "../components/sections/ProjectHighlightGrid";
-import { ResearchFocusStrip } from "../components/sections/ResearchFocusStrip";
 import { TimelinePreviewSection } from "../components/sections/TimelinePreviewSection";
 
 export function HomePage() {
   return (
     <>
       <HomeHeroSection />
-      <ResearchFocusStrip />
       <ProjectHighlightGrid />
       <TimelinePreviewSection />
     </>