There is a solution:
If you do not have vim, then install it with below command in terminal:
sudo apt install vim
Then type in terminal for example like below: (bear in mind that Nordic is a name of my theme which I am using currently, the default one is /usr/share/themes/elementary/gtk-3.0/gtk.css)
sudo vim /usr/share/themes/Nordic/gtk-3.0/gtk.css
hit button with symbol / on a keyboard type .panel.maximized to find this section and hit enter.
hit insert to edit file
comment it out like that for example:
/** .panel.maximized {
background-color: #000; }
**/
and then put this into this file below the commented our fragment:
.panel.maximized > .horizontal:first-child > :first-child,
.panel.color-dark > .horizontal:first-child > :first-child {
font-size:0px;
}
hit esc on a keyboard and then type :x and hit enter to save and exit.
Log out and log in again. Applications text will disappear.