chore(oma-fetch): remove unnecessary dep thiserror

Author: eatradish

Cargo.lock

@@ -8,7 +8,6 @@ license = "MIT"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-thiserror = "2"
 reqwest = { version = "0.12", default-features = false, features = ["stream"] }
 tokio = { version = "1.28", default-features = false, features = ["fs"] }
 serde = { version = "1.0", features = ["derive"] }