rust-agent: Remove unused imports

This addresses the following warnings (and similar ones)::

    Compiling rustjail v0.1.0 (/home/ddd/go/src/github.com/kata-containers-2.0/src/agent/rustjail)
    warning: unused import: `debug`
      --> rustjail/src/container.rs:57:12
       |
    57 | use slog::{debug, info, o, Logger};
       |            ^^^^^

    warning: unused imports: `AddressFamily`, `SockFlag`, `SockType`, `self`
      --> rustjail/src/process.rs:18:24
       |
    18 | use nix::sys::socket::{self, AddressFamily, SockFlag, SockType};
       |                        ^^^^  ^^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^

    warning: unused import: `nix::Error`
      --> rustjail/src/process.rs:23:5
       |
    23 | use nix::Error;
       |     ^^^^^^^^^^

    warning: unused import: `protobuf::RepeatedField`
      --> rustjail/src/validator.rs:11:5
       |
    11 | use protobuf::RepeatedField;
       |     ^^^^^^^^^^^^^^^^^^^^^^^

Fixes: #750

Signed-off-by: Christophe de Dinechin <dinechin@redhat.com>

tools/agent-ctl/Cargo.lock

@@ -1,20 +1,5 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-[[package]]
-name = "addr2line"
-version = "0.12.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "602d785912f476e480434627e8732e6766b760c045bbf897d9dfaa9f4fbd399c"
-dependencies = [
- "gimli",
-]
-
-[[package]]
-name = "adler32"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "567b077b825e468cc974f0020d4082ee6e03132512f207ef1a02fd5d00d1f32d"
-
 [[package]]
 name = "aho-corasick"
 version = "0.7.13"
@@ -35,9 +20,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.31"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85bb70cc08ec97ca5450e6eba421deeea5f172c0fc61f78b5357b2a8e8be195f"
+checksum = "6b602bfe940d21c130f3895acd65221e8a61270debe89d628b9cb4e3ccb8569b"
 
 [[package]]
 name = "arc-swap"
@@ -74,20 +59,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
-[[package]]
-name = "backtrace"
-version = "0.3.49"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05100821de9e028f12ae3d189176b41ee198341eb8f369956407fea2f5cc666c"
-dependencies = [
- "addr2line",
- "cfg-if",
- "libc",
- "miniz_oxide",
- "object",
- "rustc-demangle",
-]
-
 [[package]]
 name = "base64"
 version = "0.11.0"
@@ -240,7 +211,6 @@ version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d371106cc88ffdfb1eabd7111e432da544f16f3e2d7bf1dfe8bf575f1df045cd"
 dependencies = [
- "backtrace",
  "version_check",
 ]
 
@@ -267,12 +237,6 @@ dependencies = [
  "wasi",
 ]
 
-[[package]]
-name = "gimli"
-version = "0.21.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bcc8e0c9bce37868955864dbecd2b1ab2bdf967e6f28066d65aaac620444b65c"
-
 [[package]]
 name = "hermit-abi"
 version = "0.1.14"
@@ -361,15 +325,6 @@ version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
 
-[[package]]
-name = "miniz_oxide"
-version = "0.3.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "791daaae1ed6889560f8c4359194f56648355540573244a5448a83ba1ecc7435"
-dependencies = [
- "adler32",
-]
-
 [[package]]
 name = "nix"
 version = "0.16.1"
@@ -415,12 +370,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "object"
-version = "0.20.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
-
 [[package]]
 name = "oci"
 version = "0.1.0"
@@ -606,19 +555,13 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "rustc-demangle"
-version = "0.1.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
-
 [[package]]
 name = "rustjail"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "caps",
  "dirs",
- "error-chain",
  "lazy_static",
  "libc",
  "nix 0.17.0",

tools/agent-ctl/src/utils.rs

@@ -8,8 +8,7 @@ use anyhow::{anyhow, Result};
 use oci::{Process as ociProcess, Root as ociRoot, Spec as ociSpec};
 use protocols::oci::{
     Box as grpcBox, Linux as grpcLinux, LinuxCapabilities as grpcLinuxCapabilities,
-    POSIXRlimit as grpcPOSIXRlimit, Process as grpcProcess, Root as grpcRoot, Spec as grpcSpec,
-    User as grpcUser,
+    Process as grpcProcess, Root as grpcRoot, Spec as grpcSpec, User as grpcUser,
 };
 use rand::Rng;
 use slog::{debug, warn};