refactor: replace once_cell crate with std equivalent (#1260)

Cargo.toml

@@ -23,7 +23,6 @@ path = "src/main.rs"
 [dependencies]
 home = "~0.5"
 etcetera = "~0.8"
-once_cell = "~1.19"
 serde = { version = "~1.0", features = ["derive"] }
 toml = "0.8"
 which_crate = { version = "~6.0", package = "which" }