fix: remove now-unused is_sorted

Cargo.lock

@@ -1916,12 +1916,6 @@ dependencies = [
  "windows-sys 0.42.0",
 ]
 
-[[package]]
-name = "is_sorted"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "357376465c37db3372ef6a00585d336ed3d0f11d4345eef77ebcb05865392b21"
-
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -2452,7 +2446,6 @@ dependencies = [
  "humantime",
  "humantime-serde",
  "hyper",
- "is_sorted",
  "itertools",
  "metrics",
  "nix",

Cargo.toml

@@ -57,7 +57,6 @@ humantime = "2.1"
 humantime-serde = "1.1.1"
 hyper = "0.14"
 hyper-tungstenite = "0.9"
-is_sorted = "0.1.1"
 itertools = "0.10"
 jsonwebtoken = "8"
 libc = "0.2"

pageserver/Cargo.toml

@@ -31,7 +31,6 @@ hex.workspace = true
 humantime.workspace = true
 humantime-serde.workspace = true
 hyper.workspace = true
-is_sorted.workspace = true
 itertools.workspace = true
 nix.workspace = true
 num-traits.workspace = true