To hide Dashboard and Profile link from user menu in the Right region
Add this CSS in Edwiser RemUI General settings >> Custom CSS section:

.navbar .usermenu .dropdown-menu > .dropdown-item:first-child,
.navbar .usermenu .dropdown-item:first-child + .dropdown-divider,
.navbar .usermenu .dropdown-item:first-child + .dropdown-divider + .dropdown-item {
display: none;
}


Note: It is applicable for Moodle and Edwiser RemUI version 3.7 and above