vmstat: replace uucore/custom-tz-fmt with jiff

because the feature no longer exists. And remove chrono.

Cargo.lock

@@ -1100,6 +1100,7 @@ dependencies = [
  "clap_complete",
  "clap_mangen",
  "ctor",
+ "jiff",
  "libc",
  "phf",
  "phf_codegen",
@@ -1867,8 +1868,8 @@ name = "uu_vmstat"
 version = "0.0.1"
 dependencies = [
  "bytesize",
- "chrono",
  "clap",
+ "jiff",
  "terminal_size",
  "uu_slabtop",
  "uucore",

Cargo.toml

@@ -60,6 +60,7 @@ clap_mangen = "0.2.20"
 crossterm = "0.29.0"
 ctor = "0.5.0"
 dirs = "6.0.0"
+jiff = "0.2.15"
 libc = "0.2.154"
 nix = { version = "0.30", default-features = false, features = ["process"] }
 phf = "0.13.1"
@@ -84,6 +85,7 @@ xattr = "1.3.1"
 clap = { workspace = true }
 clap_complete = { workspace = true }
 clap_mangen = { workspace = true }
+jiff = { workspace = true }
 phf = { workspace = true }
 regex = { workspace = true }
 sysinfo = { workspace = true }

src/uu/vmstat/Cargo.toml

@@ -12,8 +12,8 @@ version.workspace = true
 
 [dependencies]
 bytesize = { workspace = true }
-chrono = { workspace = true, default-features = false, features = ["clock"] }
 clap = { workspace = true }
+jiff = { workspace = true }
 terminal_size = { workspace = true }
 uucore = { workspace = true }
 

src/uu/vmstat/src/picker.rs

@@ -69,7 +69,7 @@ pub fn get_pickers(matches: &ArgMatches) -> Vec<Picker> {
         pickers.push(concat_helper(
             (
                 "-----timestamp-----".into(),
-                format!("{:>19}", uucore::custom_tz_fmt::custom_time_format("%Z")),
+                format!("{:>19}", jiff::Zoned::now().strftime("%Z").to_string()),
             ),
             get_timestamp,
         ));
@@ -471,6 +471,6 @@ fn get_timestamp(
 ) -> Vec<(usize, String)> {
     vec![(
         10,
-        chrono::Local::now().format("%Y-%m-%d %H:%M:%S").to_string(),
+        jiff::Zoned::now().strftime("%Y-%m-%d %H:%M:%S").to_string(),
     )]
 }