chore: drop unused dependency on ctor

Cargo.lock

@@ -545,16 +545,6 @@ version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b10589d1a5e400d61f9f38f12f884cfd080ff345de8f17efda36fe0e4a02aa8"
 
-[[package]]
-name = "ctor"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a2785755761f3ddc1492979ce1e48d2c00d09311c39e4466429188f3dd6501"
-dependencies = [
- "quote",
- "syn 2.0.110",
-]
-
 [[package]]
 name = "ctr"
 version = "0.9.2"
@@ -2108,7 +2098,6 @@ version = "0.23.0"
 dependencies = [
  "anyhow",
  "clap",
- "ctor",
  "culpa",
  "duration-str",
  "html-page",

Cargo.toml

@@ -41,7 +41,6 @@ version = "0.18.0"
 features = ["default", "test"]
 
 [dev-dependencies]
-ctor = "0.2.8"
 culpa = "1.0.2"
 qcheck = { version = "1", default-features = false }
 qcheck-macros = { version = "1", default-features = false }