Remove stray extra format placeholder
Remove stray extra format placeholder

Presumably this was previously going to contain the exception. That's not necessary as the subsequent `raise` will make it visible.

wagtail/wagtail,mixxorz/wagtail,zerolab/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,wagtail/wagtail,jnns/wagtail,thenewguy/wagtail,thenewguy/wagtail,zerolab/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,zerolab/wagtail,wagtail/wagtail,thenewguy/wagtail,rsalmaso/wagtail,mixxorz/wagtail,zerolab/wagtail,jnns/wagtail,mixxorz/wagtail,jnns/wagtail,zerolab/wagtail,thenewguy/wagtail,jnns/wagtail,thenewguy/wagtail,mixxorz/wagtail,wagtail/wagtail,wagtail/wagtail,mixxorz/wagtail