Remove API reference links

mkdocs.yml

@@ -50,17 +50,6 @@ nav:
  - PDF support: guides/pdf.md
  - Text-to-speech: guides/tts.md
  - Extracting the content of a publication: guides/content.md
- - API Reference:
- - Shared: readium/shared/index.md
- - Streamer: readium/streamer/index.md
- - Navigator: readium/navigator/index.md
- - OPDS: readium/opds/index.md
- - LCP: readium/lcp/index.md
- - Adapters:
- - PDFium Document: readium/adapters/pdfium/pdfium-document/index.md
- - PDFium Navigator: readium/adapters/pdfium/pdfium-navigator/index.md
- - PSPDFKit Document: readium/adapters/pspdfkit/pspdfkit-document/index.md
- - PSPDFKit Navigator: readium/adapters/pspdfkit/pspdfkit-navigator/index.md
 
 extra_css:
  - readium_colors.css