Remove unnecessary comemo dependency in typst-syntax (typst#6668)

Author: laurmaedje

Cargo.lock

@@ -15,7 +15,6 @@ readme = { workspace = true }
 [dependencies]
 typst-timing = { workspace = true }
 typst-utils = { workspace = true }
-comemo = { workspace = true }
 ecow = { workspace = true }
 serde = { workspace = true }
 toml = { workspace = true }