Print on demand project import page: Remove of back button

Context

Back button as presented in the screenshot below is redundant. If a user wants to return back to the dashboard there is a link in the app bar for that.

Proposal

Design

Implementation (if applicable)

• modification should be made https://gitlab.coko.foundation/ketida/lulu/-/blob/main/app/ui/import/Import.js#L26

Alternative approaches (if applicable)