You can with a quick ublock filter. I find the following works a treat:

www.linkedin.com###ember69 > div

www.linkedin.com##.pb3.pt2.learning-top-courses

www.linkedin.com##.clear-both.text-align-center.t-normal.t-12.global-footer-compact__content

www.linkedin.com###ember131 > div

www.linkedin.com###voyager-feed

www.linkedin.com##.msg-overlay-bubble-header

www.linkedin.com##.msg-overlay-list-bubble__content--scrollable.msg-overlay-list-bubble__content

www.linkedin.com###msg-overlay

www.linkedin.com###messaging-nav-item