Hide Portfolio Arrows / Squares / Title

For Whole Section including the title:

.single-portfolio .project-title .container {
    display: none !important;
}

For All Three:

#portfolio-nav {
   display: none!important;
}

For Arrows Only:

#portfolio-nav ul.controls { display: none; }

For Square Only:

#portfolio-nav li#all-items {
    display: none;
}

For Title Only:

.single-portfolio div.row div.col.section-title h1 {
    visibility: hidden;
}