Cargo.lock points to invalid surfer commit

    Updating git repository `https://gitlab.com/surfer-project/surfer.git`
error: failed to get `surfer-translation-types` as a dependency of package `spade-surfer-plugin v0.14.0 (/home/ian/src/spade/spade-surfer-plugin)`

Caused by:
  failed to load source for dependency `surfer-translation-types`

Caused by:
  Unable to update https://gitlab.com/surfer-project/surfer.git?branch=subtranslators#84ededa4

Caused by:
  revspec '84ededa41ed44a691f26265f35211c654c19a67b' not found; class=Reference (4); code=NotFound (-3)

The commit 84ededa4 does not seem to exist now in the subtranslators branch, so building spade manually or with swim fails if it isn't already fetched from git.