diff -r b84c3d43ff2e -r 645ee7225fab rust/Cargo.lock
--- a/rust/Cargo.lock	Sat Jan 30 18:30:11 2021 +0800
+++ b/rust/Cargo.lock	Mon Jan 25 11:48:47 2021 +0100
@@ -286,11 +286,6 @@
 ]
 
 [[package]]
-name = "hex"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "hg-core"
 version = "0.1.0"
 dependencies = [
@@ -300,7 +295,6 @@
  "crossbeam-channel 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "flate2 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "format-bytes 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "im-rc 15.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -956,7 +950,6 @@
 "checksum getrandom 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "fc587bc0ec293155d5bfa6b9891ec18a1e330c234f896ea47fbada4cadbe47e6"
 "checksum glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 "checksum hermit-abi 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)" = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
-"checksum hex 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "644f9158b2f133fd50f5fb3242878846d9eb792e445c893805ff0e3824006e35"
 "checksum humantime 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
 "checksum im-rc 15.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ca8957e71f04a205cb162508f9326aea04676c8dfd0711220190d6b83664f3f"
 "checksum itertools 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"