build: make procfs linux only dependency (#7156)

the dependency refuses to build on macos so builds on `main` are broken
right now, including the `release` PR.

Cargo.lock

@@ -6988,7 +6988,6 @@ dependencies = [
  "axum",
  "base64 0.21.1",
  "base64ct",
- "byteorder",
  "bytes",
  "cc",
  "chrono",

pageserver/Cargo.toml

@@ -48,7 +48,6 @@ postgres.workspace = true
 postgres_backend.workspace = true
 postgres-protocol.workspace = true
 postgres-types.workspace = true
-procfs.workspace = true
 rand.workspace = true
 regex.workspace = true
 scopeguard.workspace = true
@@ -90,6 +89,9 @@ enumset = { workspace = true, features = ["serde"]}
 strum.workspace = true
 strum_macros.workspace = true
 
+[target.'cfg(target_os = "linux")'.dependencies]
+procfs.workspace = true
+
 [dev-dependencies]
 criterion.workspace = true
 hex-literal.workspace = true

pageserver/src/virtual_file/io_engine.rs

@@ -9,6 +9,7 @@
 //!
 //!
 
+#[cfg(target_os = "linux")]
 pub(super) mod tokio_epoll_uring_ext;
 
 use tokio_epoll_uring::{IoBuf, Slice};

workspace_hack/Cargo.toml

@@ -24,7 +24,6 @@ aws-smithy-types = { version = "1", default-features = false, features = ["byte-
 axum = { version = "0.6", features = ["ws"] }
 base64 = { version = "0.21", features = ["alloc"] }
 base64ct = { version = "1", default-features = false, features = ["std"] }
-byteorder = { version = "1", features = ["i128"] }
 bytes = { version = "1", features = ["serde"] }
 chrono = { version = "0.4", default-features = false, features = ["clock", "serde", "wasmbind"] }
 clap = { version = "4", features = ["derive", "string"] }
@@ -87,7 +86,6 @@ zstd-sys = { version = "2", default-features = false, features = ["legacy", "std
 
 [build-dependencies]
 anyhow = { version = "1", features = ["backtrace"] }
-byteorder = { version = "1", features = ["i128"] }
 bytes = { version = "1", features = ["serde"] }
 cc = { version = "1", default-features = false, features = ["parallel"] }
 chrono = { version = "0.4", default-features = false, features = ["clock", "serde", "wasmbind"] }