I find the default Explorer panel to be a bit too busy. I never really use the Open Editors section (or the Outline section).
To declutter, the Explorer panel, I turn off the Open Editors and Outline section.
Right click on the "Open Editors" title and uncheck "Open Editors" (while I'm at it, I'll uncheck "Outline" as well).
Much better...
To see these sections again, click on the Top Menu > View > Open View menu item ...
and select "Open Editors" (or "Outline") from the Command Palette.