ksud: remove unused dependency

userspace/ksud/Cargo.lock

@@ -810,7 +810,6 @@ dependencies = [
  "libc",
  "log",
  "nom",
- "proc-mounts",
  "procfs",
  "regex",
  "retry",
@@ -998,15 +997,6 @@ version = "6.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"
 
-[[package]]
-name = "partition-identity"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fa925f9becb532d758b0014b472c576869910929cf4c3f8054b386f19ab9e21"
-dependencies = [
- "thiserror",
-]
-
 [[package]]
 name = "password-hash"
 version = "0.4.2"
@@ -1093,15 +1083,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "proc-mounts"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d652f8435d0ab70bf4f3590a6a851d59604831a458086541b95238cc51ffcf2"
-dependencies = [
- "partition-identity",
-]
-
 [[package]]
 name = "procfs"
 version = "0.15.1"