Remove new HTML template

[dgkeyes]

From #89:

Hey @dgkeyes I just wanted to flag that this template is not working. I think the issue is partly how the template loads into a sub-folder, but if I fix that it still doesn't have the formatting that it does before.

However, other more complicated news is that OMNI is going to do a fairly major rebrand - this will almost certainly change the color scheme and might change the logo and even fonts and stuff.

Given that, could we please pull this template from the package for now? I was trying to use it to share a quick report with a client later in the week and I just couldn't get it to work. But if we were to fix it, it might be outdated in just a few weeks due to the impending changes in style guidance. I think that the other templates we have will hold us over in the interim.

Thanks!