Remove async-trait from Cargo.toml of crates it became unused in

Cargo.lock

@@ -3522,7 +3522,6 @@ dependencies = [
  "arc-swap",
  "async-compression",
  "async-stream",
- "async-trait",
  "byteorder",
  "bytes",
  "camino",
@@ -3655,7 +3654,6 @@ dependencies = [
  "anyhow",
  "async-compression",
  "async-stream",
- "async-trait",
  "byteorder",
  "bytes",
  "chrono",
@@ -3991,7 +3989,6 @@ name = "postgres_backend"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "async-trait",
  "bytes",
  "futures",
  "once_cell",

libs/postgres_backend/Cargo.toml

@@ -5,7 +5,6 @@ edition.workspace = true
 license.workspace = true
 
 [dependencies]
-async-trait.workspace = true
 anyhow.workspace = true
 bytes.workspace = true
 futures.workspace = true

pageserver/Cargo.toml

@@ -15,7 +15,6 @@ anyhow.workspace = true
 arc-swap.workspace = true
 async-compression.workspace = true
 async-stream.workspace = true
-async-trait.workspace = true
 byteorder.workspace = true
 bytes.workspace = true
 camino.workspace = true

pageserver/compaction/Cargo.toml

@@ -11,7 +11,6 @@ default = []
 anyhow.workspace = true
 async-compression.workspace = true
 async-stream.workspace = true
-async-trait.workspace = true
 byteorder.workspace = true
 bytes.workspace = true
 chrono = { workspace = true, features = ["serde"] }