message: Remove unused crates
  Summary: These were removed by the diff before this.
diff: @@ -25,8 +25,6 @@ derivative = "2.2"
  derive_more = "0.99"
  erased-serde = "0.3.20"
  lalrpop-util = "0.19.7"
  -indenter = { version = "0.3.3", features = ["std"] }
  -indoc = "1.0"
  itertools = "0.10"
  once_cell = "1.8"
  bumpalo = "3.8"
  