Install gnome-shell-extension-hide-activities by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-shell-extension-hide-activities
Description:
GNOME shell extension that hides the activities button
This extension hides the Acitivies text and button on the top left corner of GNOME shell, making the appearance simpler and the panel less cluttered.
Homepage: https://github.com/shayel/gnome-hide-activities
Version: 0.00~git20131024.1.6574986-1
Section: universe/gnome