fix: Incorrect javadoc link

Author: lineargraph

src/doc/mkdocs.yml

@@ -32,6 +32,5 @@ nav:
   - Javadocs:
       - Home: javadocs/index.html
       - Common: javadocs/common/index.html
-      - Modern: javadocs/modern/index.html
       - Legacy: javadocs/legacy/index.html
       - Annotations: javadocs/common/io.github.notenoughupdates.moulconfig.annotations/index.html