Remove an unused import
Remove an unused import

Usages of this import were removed across multiple PRs so this wasn't picked up before merge
wagtail/wagtail,zerolab/wagtail,thenewguy/wagtail,thenewguy/wagtail,zerolab/wagtail,rsalmaso/wagtail,zerolab/wagtail,rsalmaso/wagtail,thenewguy/wagtail,wagtail/wagtail,zerolab/wagtail,zerolab/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,thenewguy/wagtail,wagtail/wagtail,thenewguy/wagtail,wagtail/wagtail,wagtail/wagtail,rsalmaso/wagtail