ksud: remove subprocess dependency (#156)

userspace/ksud/Cargo.lock

@@ -606,7 +606,6 @@ dependencies = [
  "retry",
  "serde",
  "serde_json",
- "subprocess",
  "sys-mount",
  "zip 0.6.3",
  "zip-extensions",
@@ -1001,16 +1000,6 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
-[[package]]
-name = "subprocess"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c2e86926081dda636c546d8c5e641661049d7562a68f5488be4a1f7f66f6086"
-dependencies = [
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "subtle"
 version = "2.4.1"