chore: remove unused pathdiff from workspace dependencies

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: branchseer

Cargo.toml

@@ -95,7 +95,6 @@ owo-colors = { version = "4.1.0", features = ["supports-colors"] }
 passfd = { git = "https://github.com/polachok/passfd", rev = "d55881752c16aced1a49a75f9c428d38d3767213", default-features = false }
 notify = "8.0.0"
 path-clean = "1.0.1"
-pathdiff = "0.2.3"
 petgraph = "0.8.2"
 phf = { version = "0.11.3", features = ["macros"] }
 portable-pty = "0.9.0"