can you hide the solvers in an openmdao n2 diagram

As of OpenMDAO V3.4 there is no button to hide them. There is an open issue to add that button though https://github.com/OpenMDAO/OpenMDAO/issues/1363

In the short term, since you are embedding it you can do a bit of CSS hacking to make it work.

If you add the following the CSS:

#solver_tree {
    visibility: hidden;
} 

then it will hide the solver tree for you.