I know of two solutions to this (but there should definitely be an 'official' way to do it): 1. Create a uBlock script that removes it. 1-minute example: chat.

I know of two solutions to this (but there should definitely be an 'official' way to do it): 1. Create a uBlock script that removes it. 1-minute example: chat.openai.com##:xpath(//nav[contains(@aria-label, "Chat history")]) 2. Decrease window size. Not as good as uBlock, but easy to do.