For XFMG related:
ACP > Appearance > Styles & Templates > Template Modifications > Find: whats_new_wrapper (under XenForo Media Gallery) and disable it.
For New Profile Posts, etc.
ACP > Appearance > Styles & Templates > Templates > whats_new_wrapper
Find and remove: (e.g.: New Profile Posts)
Code:
<xf:if is="$xf.visitor.canViewProfilePosts()">
<a class="{$baseClass} {{ $pageSelected == 'new_profile_post' ? {$selectedClass} : '' }}" href="{{ link('whats-new/profile-posts') }}" rel="nofollow">{{ phrase('new_profile_posts') }}</a>
</xf:if>
Hope this helps.