remove pathdiff

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

Author: devjiwonchoi

crates/next-core/Cargo.toml

@@ -15,7 +15,6 @@ workspace = true
 anyhow = { workspace = true }
 async-trait = { workspace = true }
 base64 = "0.21.0"
-pathdiff = { workspace = true }
 either = { workspace = true, features = ["serde"] }
 once_cell = { workspace = true }
 qstring = { workspace = true }