I posted a solution before, but it was for 7.1. Here's the right one.
Did you clear your cache after? It may be easier to edit the template files and remove them. Edit /templates/tmpl_evo/_sub_header.html and look for:
<td class="sys_search_wrapper">__main_search__</td>
And
<td class="sys_menu_wrapper">__service_menu__</td>
And remove them and clear Dolphin's cache. But the service_menu snippet will also remove the Account and Profile links. It seems the Evo template doesn't use the service menu builder, so this is a bug that needs to be looked into. I'll find a work-around for this if you don't want to remove the whole set of links.
It might also be better to make these changes in a custom template, so they won't be overwritten by upgrades.
Edit: To only hide the Login and Join links, edit /templates/tmpl_evo/extra_service_menu_wrapper.html and look for:
<bx_if:show_for_visitor>
<div class="sys-sm-item sys-smi-join bx-def-margin-sec-left-auto" onclick="javascript:showPopupJoinForm()">
<div class="sys-sm-profile">
<span class="sys-smp-thumbnail">
<i class="sys-icon user"></i>
</span>
<span class="sys-smp-title bx-def-margin-sec-left bx-def-margin-right">
<bx_text:_sys_sm_join_or_login />
</span>
</div>
</div>
</bx_if:show_for_visitor>
And delete the whole section, then clear cache. Again, make these changes in a custom template.
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