refactor(cleanup): remove unused components and stale docs

- delete components that no longer have any references in the current source tree
- remove the stale Link component example from the README
- drop the leftover service-page heading rule from the blog stylesheet
- keep the repo aligned with the current component graph instead of historical leftovers

www/src/styles/blog.css

@@ -11,7 +11,6 @@
 .source-page > h2:first-of-type { margin-top: 0; }
 .service-page > p > img, .service-page > img { float: right; margin: .5rem 0 1.5rem 2rem; max-height: 230px; max-width: 300px; object-fit: cover; }
 .service-page h3 { font-size: 2rem; }
-.service-page h3 + p { color: var(--color-accent-strong); font-family: var(--font-accent); font-size: 1.5rem; margin-bottom: -.8rem; }
 .blog-post-body { max-width: 960px; }
 .blog-post-body p { margin-bottom: 1.55rem; }
 .blog-post-body table { border: 1px solid #d7d9e3; border-collapse: collapse; display: table; margin: 0 0 1.4rem; width: 100%; }