404 links in front page

# Summary
There are 404 links on the front page of this repository

# URLs
Developer Reference
[oneMath Defined Datatypes](https://uxlfoundation.github.io/oneMath/onemath-datatypes.html) - results in 404
[Dense Linear Algebra](https://uxlfoundation.github.io/oneMath/domains/dense_linear_algebra.html) - results in 404

# Additional details
Please either remove or fix these links.